py3: fix test-setdiscovery.t on Python 3 by conditionalizing two lines

I'm not clear why this behaves very slightly differently on Python 3,
but I'm also not concerned about it.

Differential Revision: https://phab.mercurial-scm.org/D6658

tests/test-setdiscovery.t

@@ -1,1118 +1,1120 b''
 
 Function to test discovery between two repos in both directions, using both the local shortcut
 (which is currently not activated by default) and the full remotable protocol:
 
   $ testdesc() { # revs_a, revs_b, dagdesc
   >     if [ -d foo ]; then rm -rf foo; fi
   >     hg init foo
   >     cd foo
   >     hg debugbuilddag "$3"
   >     hg clone . a $1 --quiet
   >     hg clone . b $2 --quiet
   >     echo
   >     echo "% -- a -> b tree"
   >     hg -R a debugdiscovery b --verbose --old
   >     echo
   >     echo "% -- a -> b set"
   >     hg -R a debugdiscovery b --verbose --debug --config progress.debug=true
   >     echo
   >     echo "% -- a -> b set (tip only)"
   >     hg -R a debugdiscovery b --verbose --debug --config progress.debug=true --rev tip
   >     echo
   >     echo "% -- b -> a tree"
   >     hg -R b debugdiscovery a --verbose --old
   >     echo
   >     echo "% -- b -> a set"
   >     hg -R b debugdiscovery a --verbose --debug --config progress.debug=true
   >     echo
   >     echo "% -- b -> a set (tip only)"
   >     hg -R b debugdiscovery a --verbose --debug --config progress.debug=true --rev tip
   >     cd ..
   > }
 
 
 Small superset:
 
   $ testdesc '-ra1 -ra2' '-rb1 -rb2 -rb3' '
   > +2:f +1:a1:b1
   > <f +4 :a2
   > +5 :b2
   > <f +3 :b3'
   
   % -- a -> b tree
   comparing with b
   searching for changes
   unpruned common: 01241442b3c2 66f7d451a68b b5714e113bc0
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          2
       also local heads:          2
       also remote heads:         1
       both:                      1
     local heads:                 2
       common:                    2
       missing:                   0
     remote heads:                3
       common:                    1
       unknown:                   2
   local changesets:              7
     common:                      7
     missing:                     0
   common heads: 01241442b3c2 b5714e113bc0
   
   % -- a -> b set
   comparing with b
   query 1; heads
   searching for changes
   all local heads known remotely
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          2
       also local heads:          2
       also remote heads:         1
       both:                      1
     local heads:                 2
       common:                    2
       missing:                   0
     remote heads:                3
       common:                    1
       unknown:                   2
   local changesets:              7
     common:                      7
     missing:                     0
   common heads: 01241442b3c2 b5714e113bc0
   
   % -- a -> b set (tip only)
   comparing with b
   query 1; heads
   searching for changes
   all local heads known remotely
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          1
       also remote heads:         0
       both:                      0
     local heads:                 2
       common:                    1
       missing:                   1
     remote heads:                3
       common:                    0
       unknown:                   3
   local changesets:              7
     common:                      6
     missing:                     1
   common heads: b5714e113bc0
   
   % -- b -> a tree
   comparing with a
   searching for changes
   unpruned common: 01241442b3c2 b5714e113bc0
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          2
       also local heads:          1
       also remote heads:         2
       both:                      1
     local heads:                 3
       common:                    1
       missing:                   2
     remote heads:                2
       common:                    2
       unknown:                   0
   local changesets:             15
     common:                      7
     missing:                     8
   common heads: 01241442b3c2 b5714e113bc0
   
   % -- b -> a set
   comparing with a
   query 1; heads
   searching for changes
   all remote heads known locally
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          2
       also local heads:          1
       also remote heads:         2
       both:                      1
     local heads:                 3
       common:                    1
       missing:                   2
     remote heads:                2
       common:                    2
       unknown:                   0
   local changesets:             15
     common:                      7
     missing:                     8
   common heads: 01241442b3c2 b5714e113bc0
   
   % -- b -> a set (tip only)
   comparing with a
   query 1; heads
   searching for changes
   all remote heads known locally
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          2
       also local heads:          1
       also remote heads:         2
       both:                      1
     local heads:                 3
       common:                    1
       missing:                   2
     remote heads:                2
       common:                    2
       unknown:                   0
   local changesets:             15
     common:                      7
     missing:                     8
   common heads: 01241442b3c2 b5714e113bc0
 
 
 Many new:
 
   $ testdesc '-ra1 -ra2' '-rb' '
   > +2:f +3:a1 +3:b
   > <f +30 :a2'
   
   % -- a -> b tree
   comparing with b
   searching for changes
   unpruned common: bebd167eb94d
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          1
       also remote heads:         0
       both:                      0
     local heads:                 2
       common:                    1
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             35
     common:                      5
     missing:                    30
   common heads: bebd167eb94d
   
   % -- a -> b set
   comparing with b
   query 1; heads
   searching for changes
   taking initial sample
   searching: 2 queries
   query 2; still undecided: 29, sample size is: 29
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          1
       also remote heads:         0
       both:                      0
     local heads:                 2
       common:                    1
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             35
     common:                      5
     missing:                    30
   common heads: bebd167eb94d
   
   % -- a -> b set (tip only)
   comparing with b
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 31, sample size is: 31
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 2
       common:                    0
       missing:                   2
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             35
     common:                      2
     missing:                    33
   common heads: 66f7d451a68b
   
   % -- b -> a tree
   comparing with a
   searching for changes
   unpruned common: 66f7d451a68b bebd167eb94d
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         1
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                2
       common:                    1
       unknown:                   1
   local changesets:              8
     common:                      5
     missing:                     3
   common heads: bebd167eb94d
   
   % -- b -> a set
   comparing with a
   query 1; heads
   searching for changes
   taking initial sample
   searching: 2 queries
   query 2; still undecided: 2, sample size is: 2
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         1
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                2
       common:                    1
       unknown:                   1
   local changesets:              8
     common:                      5
     missing:                     3
   common heads: bebd167eb94d
   
   % -- b -> a set (tip only)
   comparing with a
   query 1; heads
   searching for changes
   taking initial sample
   searching: 2 queries
   query 2; still undecided: 2, sample size is: 2
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         1
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                2
       common:                    1
       unknown:                   1
   local changesets:              8
     common:                      5
     missing:                     3
   common heads: bebd167eb94d
 
 Both sides many new with stub:
 
   $ testdesc '-ra1 -ra2' '-rb' '
   > +2:f +2:a1 +30 :b
   > <f +30 :a2'
   
   % -- a -> b tree
   comparing with b
   searching for changes
   unpruned common: 2dc09a01254d
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          1
       also remote heads:         0
       both:                      0
     local heads:                 2
       common:                    1
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             34
     common:                      4
     missing:                    30
   common heads: 2dc09a01254d
   
   % -- a -> b set
   comparing with b
   query 1; heads
   searching for changes
   taking initial sample
   searching: 2 queries
   query 2; still undecided: 29, sample size is: 29
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          1
       also remote heads:         0
       both:                      0
     local heads:                 2
       common:                    1
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             34
     common:                      4
     missing:                    30
   common heads: 2dc09a01254d
   
   % -- a -> b set (tip only)
   comparing with b
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 31, sample size is: 31
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 2
       common:                    0
       missing:                   2
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             34
     common:                      2
     missing:                    32
   common heads: 66f7d451a68b
   
   % -- b -> a tree
   comparing with a
   searching for changes
   unpruned common: 2dc09a01254d 66f7d451a68b
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         1
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                2
       common:                    1
       unknown:                   1
   local changesets:             34
     common:                      4
     missing:                    30
   common heads: 2dc09a01254d
   
   % -- b -> a set
   comparing with a
   query 1; heads
   searching for changes
   taking initial sample
   searching: 2 queries
   query 2; still undecided: 29, sample size is: 29
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         1
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                2
       common:                    1
       unknown:                   1
   local changesets:             34
     common:                      4
     missing:                    30
   common heads: 2dc09a01254d
   
   % -- b -> a set (tip only)
   comparing with a
   query 1; heads
   searching for changes
   taking initial sample
   searching: 2 queries
   query 2; still undecided: 29, sample size is: 29
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         1
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                2
       common:                    1
       unknown:                   1
   local changesets:             34
     common:                      4
     missing:                    30
   common heads: 2dc09a01254d
 
 
 Both many new:
 
   $ testdesc '-ra' '-rb' '
   > +2:f +30 :b
   > <f +30 :a'
   
   % -- a -> b tree
   comparing with b
   searching for changes
   unpruned common: 66f7d451a68b
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             32
     common:                      2
     missing:                    30
   common heads: 66f7d451a68b
   
   % -- a -> b set
   comparing with b
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 31, sample size is: 31
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             32
     common:                      2
     missing:                    30
   common heads: 66f7d451a68b
   
   % -- a -> b set (tip only)
   comparing with b
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 31, sample size is: 31
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             32
     common:                      2
     missing:                    30
   common heads: 66f7d451a68b
   
   % -- b -> a tree
   comparing with a
   searching for changes
   unpruned common: 66f7d451a68b
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             32
     common:                      2
     missing:                    30
   common heads: 66f7d451a68b
   
   % -- b -> a set
   comparing with a
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 31, sample size is: 31
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             32
     common:                      2
     missing:                    30
   common heads: 66f7d451a68b
   
   % -- b -> a set (tip only)
   comparing with a
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 31, sample size is: 31
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             32
     common:                      2
     missing:                    30
   common heads: 66f7d451a68b
 
 
 Both many new skewed:
 
   $ testdesc '-ra' '-rb' '
   > +2:f +30 :b
   > <f +50 :a'
   
   % -- a -> b tree
   comparing with b
   searching for changes
   unpruned common: 66f7d451a68b
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             52
     common:                      2
     missing:                    50
   common heads: 66f7d451a68b
   
   % -- a -> b set
   comparing with b
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 51, sample size is: 51
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             52
     common:                      2
     missing:                    50
   common heads: 66f7d451a68b
   
   % -- a -> b set (tip only)
   comparing with b
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 51, sample size is: 51
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             52
     common:                      2
     missing:                    50
   common heads: 66f7d451a68b
   
   % -- b -> a tree
   comparing with a
   searching for changes
   unpruned common: 66f7d451a68b
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             32
     common:                      2
     missing:                    30
   common heads: 66f7d451a68b
   
   % -- b -> a set
   comparing with a
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 31, sample size is: 31
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             32
     common:                      2
     missing:                    30
   common heads: 66f7d451a68b
   
   % -- b -> a set (tip only)
   comparing with a
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 31, sample size is: 31
   2 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:             32
     common:                      2
     missing:                    30
   common heads: 66f7d451a68b
 
 
 Both many new on top of long history:
 
   $ testdesc '-ra' '-rb' '
   > +1000:f +30 :b
   > <f +50 :a'
   
   % -- a -> b tree
   comparing with b
   searching for changes
   unpruned common: 7ead0cba2838
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:           1050
     common:                   1000
     missing:                    50
   common heads: 7ead0cba2838
   
   % -- a -> b set
   comparing with b
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 1049, sample size is: 11
   sampling from both directions
   searching: 3 queries
   query 3; still undecided: 31, sample size is: 31
   3 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:           1050
     common:                   1000
     missing:                    50
   common heads: 7ead0cba2838
   
   % -- a -> b set (tip only)
   comparing with b
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 1049, sample size is: 11
   sampling from both directions
   searching: 3 queries
   query 3; still undecided: 31, sample size is: 31
   3 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:           1050
     common:                   1000
     missing:                    50
   common heads: 7ead0cba2838
   
   % -- b -> a tree
   comparing with a
   searching for changes
   unpruned common: 7ead0cba2838
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:           1030
     common:                   1000
     missing:                    30
   common heads: 7ead0cba2838
   
   % -- b -> a set
   comparing with a
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 1029, sample size is: 11
   sampling from both directions
   searching: 3 queries
   query 3; still undecided: 15, sample size is: 15
   3 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:           1030
     common:                   1000
     missing:                    30
   common heads: 7ead0cba2838
   
   % -- b -> a set (tip only)
   comparing with a
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 1029, sample size is: 11
   sampling from both directions
   searching: 3 queries
   query 3; still undecided: 15, sample size is: 15
   3 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:                 1
       common:                    0
       missing:                   1
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:           1030
     common:                   1000
     missing:                    30
   common heads: 7ead0cba2838
 
 
 One with >200 heads. We now switch to send them all in the initial roundtrip, but still do sampling for the later request.
 
   $ hg init manyheads
   $ cd manyheads
   $ echo "+300:r @a" >dagdesc
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3 *r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3*r+3" >>dagdesc # 20 heads
   $ echo "@b *r+3" >>dagdesc # one more head
   $ hg debugbuilddag <dagdesc
   reading DAG from stdin
 
   $ hg heads -t --template . | wc -c
   \s*261 (re)
 
   $ hg clone -b a . a
   adding changesets
   adding manifests
   adding file changes
   added 1340 changesets with 0 changes to 0 files (+259 heads)
   new changesets 1ea73414a91b:1c51e2c80832
   updating to branch a
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg clone -b b . b
   adding changesets
   adding manifests
   adding file changes
   added 304 changesets with 0 changes to 0 files
   new changesets 1ea73414a91b:513314ca8b3a
   updating to branch b
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg -R a debugdiscovery b --debug --verbose --config progress.debug=true
   comparing with b
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 1080, sample size is: 100
   sampling from both directions
   searching: 3 queries
   query 3; still undecided: 980, sample size is: 200
   sampling from both directions
   searching: 4 queries
-  query 4; still undecided: 435, sample size is: 210
+  query 4; still undecided: 435, sample size is: 210 (no-py3 !)
+  query 4; still undecided: 430, sample size is: 210 (py3 !)
   sampling from both directions
   searching: 5 queries
-  query 5; still undecided: 185, sample size is: 185
+  query 5; still undecided: 185, sample size is: 185 (no-py3 !)
+  query 5; still undecided: 187, sample size is: 187 (py3 !)
   5 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:               260
       common:                    0
       missing:                 260
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:           1340
     common:                    300
     missing:                  1040
   common heads: 3ee37d65064a
   $ hg -R a debugdiscovery b --debug --verbose --config progress.debug=true --rev tip
   comparing with b
   query 1; heads
   searching for changes
   taking quick initial sample
   searching: 2 queries
   query 2; still undecided: 303, sample size is: 9
   sampling from both directions
   searching: 3 queries
   query 3; still undecided: 3, sample size is: 3
   3 total queries in *.????s (glob)
   elapsed time:  * seconds (glob)
   heads summary:
     total common heads:          1
       also local heads:          0
       also remote heads:         0
       both:                      0
     local heads:               260
       common:                    0
       missing:                 260
     remote heads:                1
       common:                    0
       unknown:                   1
   local changesets:           1340
     common:                    300
     missing:                  1040
   common heads: 3ee37d65064a
 
 Test actual protocol when pulling one new head in addition to common heads
 
   $ hg clone -U b c
   $ hg -R c id -ir tip
   513314ca8b3a
   $ hg -R c up -qr default
   $ touch c/f
   $ hg -R c ci -Aqm "extra head"
   $ hg -R c id -i
   e64a39e7da8b
 
   $ hg serve -R c -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
   $ cat hg.pid >> $DAEMON_PIDS
 
   $ hg -R b incoming http://localhost:$HGPORT/ -T '{node|short}\n'
   comparing with http://localhost:$HGPORT/
   searching for changes
   e64a39e7da8b
 
   $ killdaemons.py
   $ cut -d' ' -f6- access.log | grep -v cmd=known # cmd=known uses random sampling
   "GET /?cmd=capabilities HTTP/1.1" 200 -
   "GET /?cmd=batch HTTP/1.1" 200 - x-hgarg-1:cmds=heads+%3Bknown+nodes%3D513314ca8b3ae4dac8eec56966265b00fcf866db x-hgproto-1:0.1 0.2 comp=$USUAL_COMPRESSIONS$ partial-pull
   "GET /?cmd=getbundle HTTP/1.1" 200 - x-hgarg-1:$USUAL_BUNDLE_CAPS$&cg=1&common=513314ca8b3ae4dac8eec56966265b00fcf866db&heads=e64a39e7da8b0d54bc63e81169aff001c13b3477 x-hgproto-1:0.1 0.2 comp=$USUAL_COMPRESSIONS$ partial-pull
   "GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=phases x-hgproto-1:0.1 0.2 comp=$USUAL_COMPRESSIONS$ partial-pull
   $ cat errors.log
 
   $ cd ..
 
 
 Issue 4438 - test coverage for 3ef893520a85 issues.
 
   $ mkdir issue4438
   $ cd issue4438
 #if false
 generate new bundles:
   $ hg init r1
   $ for i in `"$PYTHON" $TESTDIR/seq.py 101`; do hg -R r1 up -qr null && hg -R r1 branch -q b$i && hg -R r1 ci -qmb$i; done
   $ hg clone -q r1 r2
   $ for i in `"$PYTHON" $TESTDIR/seq.py 10`; do hg -R r1 up -qr null && hg -R r1 branch -q c$i && hg -R r1 ci -qmc$i; done
   $ hg -R r2 branch -q r2change && hg -R r2 ci -qmr2change
   $ hg -R r1 bundle -qa $TESTDIR/bundles/issue4438-r1.hg
   $ hg -R r2 bundle -qa $TESTDIR/bundles/issue4438-r2.hg
 #else
 use existing bundles:
   $ hg init r1
   $ hg -R r1 -q unbundle $TESTDIR/bundles/issue4438-r1.hg
   $ hg -R r1 -q up
   $ hg init r2
   $ hg -R r2 -q unbundle $TESTDIR/bundles/issue4438-r2.hg
   $ hg -R r2 -q up
 #endif
 
 Set iteration order could cause wrong and unstable results - fixed in 73cfaa348650:
 
   $ hg -R r1 outgoing r2 -T'{rev} '
   comparing with r2
   searching for changes
   101 102 103 104 105 106 107 108 109 110  (no-eol)
 
 The case where all the 'initialsamplesize' samples already were common would
 give 'all remote heads known locally' without checking the remaining heads -
 fixed in 86c35b7ae300:
 
   $ cat >> $TESTTMP/unrandomsample.py << EOF
   > import random
   > def sample(population, k):
   >     return sorted(population)[:k]
   > random.sample = sample
   > EOF
 
   $ cat >> r1/.hg/hgrc << EOF
   > [extensions]
   > unrandomsample = $TESTTMP/unrandomsample.py
   > EOF
 
   $ hg -R r1 outgoing r2 -T'{rev} ' --config extensions.blackbox= \
   > --config blackbox.track='command commandfinish discovery'
   comparing with r2
   searching for changes
   101 102 103 104 105 106 107 108 109 110  (no-eol)
   $ hg -R r1 --config extensions.blackbox= blackbox --config blackbox.track=
   * @5d0b986a083e0d91f116de4691e2aaa54d5bbec0 (*)> serve --cmdserver chgunix * (glob) (chg !)
   * @5d0b986a083e0d91f116de4691e2aaa54d5bbec0 (*)> -R r1 outgoing r2 *-T{rev} * --config *extensions.blackbox=* (glob)
   * @5d0b986a083e0d91f116de4691e2aaa54d5bbec0 (*)> found 101 common and 1 unknown server heads, 1 roundtrips in *.????s (glob)
   * @5d0b986a083e0d91f116de4691e2aaa54d5bbec0 (*)> -R r1 outgoing r2 *-T{rev} * --config *extensions.blackbox=* exited 0 after *.?? seconds (glob)
   $ cd ..