py3: have bytes version of sys.argv
sys.argv returns unicodes on Python 3. We need a bytes version for us.
There was also a python bug/feature request which wanted then to implement
one. They rejected and it is quoted in one of the comments that we can use
fsencode() to get a bytes version of sys.argv. Though not sure about its
correctness.
Link to the comment: http://bugs.python.org/
issue8776#msg217416
After this patch we will have pycompat.sysargv which will return us bytes
version of sys.argv. If this patch goes in, i will like to make transformer
rewrite sys.argv with pycompat.argv because there are lot of occurences.
util: use '\\' rather than using r'\'
We need bytes, and I find this just a little more immediately obvious
than doing rb'\'.
pycompat: introduce an alias for urllib.unquote
We have to use unquote_to_bytes on Python 3, so we need an abstraction
for this.
keyword: handle filectx _customcmp
Suggested by Yuya Nishihara:
https://www.mercurial-scm.org/pipermail/mercurial-devel/2016-October/089461.html
Related to
issue5364.
mail: do not print(), use ui.debug() instead
Since print() can't take a bytes output, it's pretty useless in Mercurial
on Python 3. As this is a debug message, switching to ui.debug() seems fine.