Fix #304 Git commit emails appear escaped (sometimes)

If the commit author is greater than 15 characters smart_word_breaker
may introduce a <wbr /> between a HTML entity. For example
Sahil Muthoo <sahil.muthoo@gmail.com> becomes
Sahil Muthoo &l<wbr/>t;sahil.m<wbr/>uthoo@gmail.com&gt;.