I know that TeX (and thus LaTeX) uses boxes and glue to lay out text, but I can't find how to control the glue dimensions.
Specifically, I have one troublesome paragraph that doesn't justify well because the last word on a line is too long and unhyphenable (it's "
``What"), and I want to increase the interword glue flexibility to allow very large interword spaces to get the offending last word to move onto the next line.
I only want to relax the interword spacing for that one paragraph. How to do that in LaTeX? (XeLaTeX specifically?)