test-export: be more aggressive about quoting ^

An upcoming change to check-code will notice this isn't quoted
enough. Presumably it's been fine by luck all this time.

tests/test-export.t

@@ -1,224 +1,224 b''
   $ hg init repo
   $ cd repo
   $ touch foo
   $ hg add foo
   $ for i in 0 1 2 3 4 5 6 7 8 9 10 11; do
   >    echo "foo-$i" >> foo
   >    hg ci -m "foo-$i"
   > done
 
   $ for out in "%nof%N" "%%%H" "%b-%R" "%h" "%r" "%m"; do
   >    echo
   >    echo "# foo-$out.patch"
   >    hg export -v -o "foo-$out.patch" 2:tip
   > done
   
   # foo-%nof%N.patch
   exporting patches:
   foo-01of10.patch
   foo-02of10.patch
   foo-03of10.patch
   foo-04of10.patch
   foo-05of10.patch
   foo-06of10.patch
   foo-07of10.patch
   foo-08of10.patch
   foo-09of10.patch
   foo-10of10.patch
   
   # foo-%%%H.patch
   exporting patches:
   foo-%617188a1c80f869a7b66c85134da88a6fb145f67.patch
   foo-%dd41a5ff707a5225204105611ba49cc5c229d55f.patch
   foo-%f95a5410f8664b6e1490a4af654e4b7d41a7b321.patch
   foo-%4346bcfde53b4d9042489078bcfa9c3e28201db2.patch
   foo-%afda8c3a009cc99449a05ad8aa4655648c4ecd34.patch
   foo-%35284ce2b6b99c9d2ac66268fe99e68e1974e1aa.patch
   foo-%9688c41894e6931305fa7165a37f6568050b4e9b.patch
   foo-%747d3c68f8ec44bb35816bfcd59aeb50b9654c2f.patch
   foo-%5f17a83f5fbd9414006a5e563eab4c8a00729efd.patch
   foo-%f3acbafac161ec68f1598af38f794f28847ca5d3.patch
   
   # foo-%b-%R.patch
   exporting patches:
   foo-repo-2.patch
   foo-repo-3.patch
   foo-repo-4.patch
   foo-repo-5.patch
   foo-repo-6.patch
   foo-repo-7.patch
   foo-repo-8.patch
   foo-repo-9.patch
   foo-repo-10.patch
   foo-repo-11.patch
   
   # foo-%h.patch
   exporting patches:
   foo-617188a1c80f.patch
   foo-dd41a5ff707a.patch
   foo-f95a5410f866.patch
   foo-4346bcfde53b.patch
   foo-afda8c3a009c.patch
   foo-35284ce2b6b9.patch
   foo-9688c41894e6.patch
   foo-747d3c68f8ec.patch
   foo-5f17a83f5fbd.patch
   foo-f3acbafac161.patch
   
   # foo-%r.patch
   exporting patches:
   foo-02.patch
   foo-03.patch
   foo-04.patch
   foo-05.patch
   foo-06.patch
   foo-07.patch
   foo-08.patch
   foo-09.patch
   foo-10.patch
   foo-11.patch
   
   # foo-%m.patch
   exporting patches:
   foo-foo_2.patch
   foo-foo_3.patch
   foo-foo_4.patch
   foo-foo_5.patch
   foo-foo_6.patch
   foo-foo_7.patch
   foo-foo_8.patch
   foo-foo_9.patch
   foo-foo_10.patch
   foo-foo_11.patch
 
 Doing it again clobbers the files rather than appending:
   $ hg export -v -o "foo-%m.patch" 2:3
   exporting patches:
   foo-foo_2.patch
   foo-foo_3.patch
   $ grep HG foo-foo_2.patch | wc -l
   \s*1 (re)
   $ grep HG foo-foo_3.patch | wc -l
   \s*1 (re)
 
 Exporting 4 changesets to a file:
 
   $ hg export -o export_internal 1 2 3 4
   $ grep HG export_internal | wc -l
   \s*4 (re)
 
 Doing it again clobbers the file rather than appending:
   $ hg export -o export_internal 1 2 3 4
   $ grep HG export_internal | wc -l
   \s*4 (re)
 
 Exporting 4 changesets to stdout:
 
   $ hg export 1 2 3 4 | grep HG | wc -l
   \s*4 (re)
 
 Exporting revision -2 to a file:
 
   $ hg export -- -2
   # HG changeset patch
   # User test
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID 5f17a83f5fbd9414006a5e563eab4c8a00729efd
   # Parent  747d3c68f8ec44bb35816bfcd59aeb50b9654c2f
   foo-10
   
   diff -r 747d3c68f8ec -r 5f17a83f5fbd foo
   --- a/foo	Thu Jan 01 00:00:00 1970 +0000
   +++ b/foo	Thu Jan 01 00:00:00 1970 +0000
   @@ -8,3 +8,4 @@
    foo-7
    foo-8
    foo-9
   +foo-10
 
 No filename should be printed if stdout is specified explicitly:
 
   $ hg export -v 1 -o -
   exporting patch:
   # HG changeset patch
   # User test
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID d1c9656e973cfb5aebd5499bbd2cb350e3b12266
   # Parent  871558de6af2e8c244222f8eea69b782c94ce3df
   foo-1
   
   diff -r 871558de6af2 -r d1c9656e973c foo
   --- a/foo	Thu Jan 01 00:00:00 1970 +0000
   +++ b/foo	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +1,2 @@
    foo-0
   +foo-1
 
 Checking if only alphanumeric characters are used in the file name (%m option):
 
   $ echo "line" >> foo
-  $ hg commit -m " !\"#$%&(,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_\`abcdefghijklmnopqrstuvwxyz{|}~"
+  $ hg commit -m " !\"#$%&(,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]"'^'"_\`abcdefghijklmnopqrstuvwxyz{|}~"
   $ hg export -v -o %m.patch tip
   exporting patch:
   ____________0123456789_______ABCDEFGHIJKLMNOPQRSTUVWXYZ______abcdefghijklmnopqrstuvwxyz____.patch
 
 Catch exporting unknown revisions (especially empty revsets, see issue3353)
 
   $ hg export
   # HG changeset patch
   # User test
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID 197ecd81a57f760b54f34a58817ad5b04991fa47
   # Parent  f3acbafac161ec68f1598af38f794f28847ca5d3
    !"#$%&(,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
   
   diff -r f3acbafac161 -r 197ecd81a57f foo
   --- a/foo	Thu Jan 01 00:00:00 1970 +0000
   +++ b/foo	Thu Jan 01 00:00:00 1970 +0000
   @@ -10,3 +10,4 @@
    foo-9
    foo-10
    foo-11
   +line
 
   $ hg export ""
   hg: parse error: empty query
   [255]
   $ hg export 999
   abort: unknown revision '999'!
   [255]
   $ hg export "not all()"
   abort: export requires at least one changeset
   [255]
 
 Check for color output
   $ cat <<EOF >> $HGRCPATH
   > [color]
   > mode = ansi
   > [extensions]
   > color =
   > EOF
 
   $ hg export --color always --nodates tip
   # HG changeset patch
   # User test
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID * (glob)
   # Parent * (glob)
    !"#$%&(,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
   
   \x1b[0;1mdiff -r f3acbafac161 -r 197ecd81a57f foo\x1b[0m (esc)
   \x1b[0;31;1m--- a/foo\x1b[0m (esc)
   \x1b[0;32;1m+++ b/foo\x1b[0m (esc)
   \x1b[0;35m@@ -10,3 +10,4 @@\x1b[0m (esc)
    foo-9
    foo-10
    foo-11
   \x1b[0;32m+line\x1b[0m (esc)
 
 
   $ cd ..