Allow hyphenation of partially-emphasised substrings
Description
The package fixes the problem of TeX failing to hyphenate
letter strings that seem (to TeX) to be words, but which are
followed by an apostrophe and then an emphasis command. The
cause of the problem is not the apostrophe, but the font change
in the middle of the string. The problem arises in Catalan,
French, Italian and Romansh.
