SSML: Fix bug where <mark> was ignored before some punctuation characters.
Lang=fr: Don't stress monosyllables, except at end-of-clause or before phoneme [_;_]
git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@217 d46cf337-b52f-0410-862d-fd96e6ae7743