Small problem with the LaTeX grammar's handling of single quote strings. The following:
'tis suppos'
as it occurs in:
'tis suppos'd
gets scoped as invalid.illegal.string.quoted.single.latex. LaTeX, however, has no problem with such constructions. Perhaps this would be difficult to fix and the problem is, in any case, rare. (I only hit upon it writing a Hume lecture.) Just thought I would pass it on.
Best, Mark