Issue #310: Accentuated characters improperly rendered (appear as `?`) on hg repositories (conservancy/kallithea)

[Romain DEP.]

New issue 310: Accentuated characters improperly rendered (appear as `?`) on hg repositories
https://bitbucket.org/conservancy/kallithea/issues/310/accentuated-characters-improperly-rendered

Romain DEP.:

Changesets with a description containing accentuated characters are shown with question marks in place of said characters.

* repro url for hg: [link](https://code.tamytro.org/kallithea-bug-repro-hg)
* non-repro for git: [link](https://code.tamytro.org/kallithea-bug-repro-git)
* kallithea version: 522cfb2be9e1
* os & env: ```rpm -qa|grep "wsgi\|httpd" → 
httpd-2.4.29-1.fc27.x86_64
mod_wsgi-4.5.15-4.fc27.x86_64```
* ```python --version → 
Python 2.7.14```
* ```hg version → Mercurial Distributed SCM (version 4.4.2)```