D2987: stringutil: add function to pretty print an object

[durin42 (Augie Fackler)]

durin42 added inline comments.

INLINE COMMENTS

> indygreg wrote in stringutil.py:39
> Because of differences with `b''` in Python 3 :/

😭

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2987

To: indygreg, #hg-reviewers
Cc: durin42, mercurial-devel