I have an overfull box in a French text which looks like this:
The sequence at the end of the line is:
d'Ananias~: \og Vous
"Vous" cannot be hyphenated and
\og inserts a non-secable space, so the only place where it could be cut is after the colon.
I'm using XeTeX with microtype (2.5 beta6 for XeTeX support). How can I fix this overfull box?
Do I have to allow lines to stretch more (and how)?