D3439: templatefilters: add commonprefix

[martinvonz (Martin von Zweigbergk)]

martinvonz added a comment.


  Do you think we should call it `commonpath()` or `commondir()` instead in case we want `commonprefix()` to work for any string in the future (and not care about path separators)?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3439

To: joerg.sonnenberger, #hg-reviewers
Cc: martinvonz, yuja, mercurial-devel