D5690: py3: use regular expression to deal with ENOENT formatting change

[yuja (Yuya Nishihara)]

yuja added a comment.


  >   $ hg log -b --cwd=inexistent default
  > 
  > - abort: $ENOENT$: 'inexistent' +  abort: \$ENOENT\$: ('inexistent'|inexistent) (re)
  
  That's our fault. The exception is caught as IOError on Python 3, and our
  formatting of IOError and OSError are slightly different!
  
  Maybe we should unify them.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5690

To: durin42, #hg-reviewers, pulkit
Cc: yuja, mercurial-devel