py3: suppress the return value of write() in tests/test-subrepo-missing.t

write() on Python 3 returns a value whereas does not return anything on Python 2.
So we need to supress the value.

Differential Revision: https://phab.mercurial-scm.org/D3283

tests/test-subrepo-missing.t

@@ -1,141 +1,141
   $ hg init repo
   $ cd repo
   $ hg init subrepo
   $ echo a > subrepo/a
   $ hg -R subrepo ci -Am adda
   adding a
   $ echo 'subrepo = subrepo' > .hgsub
   $ hg ci -Am addsubrepo
   adding .hgsub
   $ echo b > subrepo/b
   $ hg -R subrepo ci -Am addb
   adding b
   $ hg ci -m updatedsub
 
 ignore blanklines in .hgsubstate
 
-  >>> open('.hgsubstate', 'wb').write(b'\n\n   \t \n   \n')
+  >>> open('.hgsubstate', 'wb').write(b'\n\n   \t \n   \n') and None
   $ hg st --subrepos
   M .hgsubstate
   $ hg revert -qC .hgsubstate
 
 abort more gracefully on .hgsubstate parsing error
 
   $ cp .hgsubstate .hgsubstate.old
-  >>> open('.hgsubstate', 'wb').write(b'\ninvalid')
+  >>> open('.hgsubstate', 'wb').write(b'\ninvalid') and None
   $ hg st --subrepos --cwd $TESTTMP -R $TESTTMP/repo
   abort: invalid subrepository revision specifier in 'repo/.hgsubstate' line 2
   [255]
   $ mv .hgsubstate.old .hgsubstate
 
 delete .hgsub and revert it
 
   $ rm .hgsub
   $ hg revert .hgsub
   warning: subrepo spec file '.hgsub' not found
   warning: subrepo spec file '.hgsub' not found
 
 delete .hgsubstate and revert it
 
   $ rm .hgsubstate
   $ hg revert .hgsubstate
 
 delete .hgsub and update
 
   $ rm .hgsub
   $ hg up 0 --cwd $TESTTMP -R $TESTTMP/repo
   warning: subrepo spec file 'repo/.hgsub' not found
   warning: subrepo spec file 'repo/.hgsub' not found
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg st
   warning: subrepo spec file '.hgsub' not found
   ! .hgsub
   $ ls subrepo
   a
 
 delete .hgsubstate and update
 
   $ hg up -C
   warning: subrepo spec file '.hgsub' not found
   warning: subrepo spec file '.hgsub' not found
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ rm .hgsubstate
   $ hg up 0
   other [destination] changed .hgsubstate which local [working copy] deleted
   use (c)hanged version or leave (d)eleted? c
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg st
   $ ls subrepo
   a
 
 Enable obsolete
 
   $ cat >> $HGRCPATH << EOF
   > [ui]
   > logtemplate= {rev}:{node|short} {desc|firstline}
   > [phases]
   > publish=False
   > [experimental]
   > evolution.createmarkers=True
   > EOF
 
 check that we can update parent repo with missing (amended) subrepo revision
 
   $ hg up --repository subrepo -r tip
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg ci -m "updated subrepo to tip"
   created new head
   $ cd subrepo
   $ hg update -r tip
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo foo > a
   $ hg commit --amend -m "addb (amended)"
   $ cd ..
   $ hg update --clean .
   revision 102a90ea7b4a in subrepository "subrepo" is hidden
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 check that --hidden is propagated to the subrepo
 
   $ hg -R subrepo up tip
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg ci -m 'commit with amended subrepo'
   $ echo bar > subrepo/a
   $ hg -R subrepo ci --amend -m "amend a (again)"
   $ hg --hidden cat subrepo/a
   foo
 
 verify will warn if locked-in subrepo revisions are hidden or missing
 
   $ hg ci -m "amended subrepo (again)"
   $ hg --config extensions.strip= --hidden strip -R subrepo -qr 'tip' --config devel.strip-obsmarkers=no
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   2 files, 5 changesets, 5 total revisions
   checking subrepo links
   subrepo 'subrepo' is hidden in revision a66de08943b6
   subrepo 'subrepo' is hidden in revision 674d05939c1e
   subrepo 'subrepo' not found in revision a7d05d9055a4
 
 verifying shouldn't init a new subrepo if the reference doesn't exist
 
   $ mv subrepo b
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   2 files, 5 changesets, 5 total revisions
   checking subrepo links
   0: repository $TESTTMP/repo/subrepo not found
   1: repository $TESTTMP/repo/subrepo not found
   3: repository $TESTTMP/repo/subrepo not found
   4: repository $TESTTMP/repo/subrepo not found
   $ ls
   b
   $ mv b subrepo
 
   $ cd ..