templater: add option to parse template string just like raw string literal This seems a bit odd because the template syntax has no raw string literal containing template fragments, but is necessary to port filename format string to templater. See the next patch.

cmdutil: reorder optional arguments passed to makefileobj() **props will be passed directly to templater.

cmdutil: strip "%m" pattern (first line of commit message) from both ends This matches the behavior of the template keyword {desc}.

test-acl: mock up util.getuser() to trust $LOGNAME on Windows The test relies on POSIX-like getuser() behavior, so we can't use windows.getuser().

fileset: drop bad "elif:" trying to check invalid size expression Since str.isdigit is a function, the last "elif" was always true. An invalid expression is rejected by util.sizetoint(), so we don't need "elif".

py3: fix test-command-template.t to write files in binary mode

py3: use bytestr() to coerce position carried by ParseError to string The position value is either int or byte string.

py3: use bytes.endswith('\n') to strip off '\n' from debug color output

py3: fix type of attribute names forwarded by templatekw._hybrid # skip-blame because just r'' prefixes

py3: move between bytes and unicode when re-raising IOError IOError is a Python exception, which argument must be a system string.