tests: add coverage to ensure Wix tracks 'help' and 'templates' files
This would have caught the problem fixed by
65d2538ac993. There are
other *.wxs files that can be checked, but they appear to be more
complicated. For example, locale.wxs has what appears to be foreach
loop support, as well as variable substitution.
By checking `hg files` to determine tracked file, this is able to avoid false
failures when other junk is present in the filesystem, like *.orig files.
I can't tell if the map-cmdline.status file is not included on purpose, but I
don't see the purpose of excluding it. The missing help files seem reasonable
for Windows.
perf: adjust perfstartup() for Windows
The /dev/null redirect was causing the following error:
The system cannot find the path specified.
Adjusting HGRCPATH as part of the command line causes the system to try to
execute 'HGRCPATH'.
mac: fix percent-encoding of non-utf-8 characters (
issue4999)