D6308: context: check file exists before getting data from _wrappedctx

[martinvonz (Martin von Zweigbergk)]

martinvonz added inline comments.

INLINE COMMENTS

> pulkit wrote in context.py:1827
> Does `str?` means that it can be a str or a None?

That would be my interpretation

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D6308

To: pulkit, #hg-reviewers
Cc: martinvonz, mercurial-devel