py3: convert hg executable path to bytes in missing case in procutil We (Google) noticed this in our tests when we use chg and a hg wrapper script not called 'hg'. The executable then ended up being a native string, which then failed in chgserver when trying to convert the environment dict to a byte string. Differential Revision: https://phab.mercurial-scm.org/D6775

#require docutils gettext

  $ $TESTDIR/check-gendoc fr
  checking for parse errors