D965: templatefilters: be sure we always feed cgi.escape a str

[durin42 (Augie Fackler)]

durin42 added a comment.


  I also popped https://phab.mercurial-scm.org/D964 out of the stack until I can address review feedback. :)

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D965

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