mercurial/templates/map-cmdline.bisect

tests: fix test-chg to ignore a warning about being unable to set locale

This is apparently coming from bash when bash is providing the sh that we're
using to execute the .sh file generated by run-tests for this test.

Bash on my machine:
```
$ sh --version
GNU bash, version 5.1.4(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

$ sh
sh-5.1$ LC_CTYPE=unsupported_value echo hi
sh: warning: setlocale: LC_CTYPE: cannot change locale (unsupported_value): No such file or directory
hi
```

Differential Revision: https://phab.mercurial-scm.org/D10468

%include map-cmdline.default

[templates]
changeset = '{cset}{lbisect}{branches}{bookmarks}{tags}{parents}{luser}{ldate}{summary}\n'
changeset_quiet = '{lshortbisect} {rev}:{node|short}\n'
changeset_verbose = '{cset}{lbisect}{branches}{bookmarks}{tags}{parents}{luser}{ldate}{lfiles}{lfile_copies_switch}{description}\n'
changeset_debug = '{fullcset}{lbisect}{branches}{bookmarks}{tags}{lphase}{parents}{manifest}{luser}{ldate}{lfile_mods}{lfile_adds}{lfile_dels}{lfile_copies_switch}{extras}{description}\n'

# We take the zeroth word in order to omit "(implicit)" in the label
bisectlabel = ' bisect.{word('0', bisect)}'

lbisect ='{label("log.bisect{if(bisect, bisectlabel)}",
                                "bisect:      {bisect}\n")}'
lshortbisect ='{label("log.bisect{if(bisect, bisectlabel)}",
                                    "{bisect|shortbisect}")}'