Fix Messages helper tests
Fix Messages helper tests

This test requires the sentence fixture because it
indirectly calls ClickableLinksHelper::clickableURL(),
which needs the sentence text to put in the title=""
attribute of the <a> tag that is created for "#[0-9]+"
patterns in messages.

Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2