Don't translate hyphens into \(hy inside \c{...} or code paragraphs,

Don't translate hyphens into \(hy inside \c{...} or code paragraphs,
because otherwise UTF-8 versions of man(1) tend to turn them into
Unicode hyphen characters, with the result that if you cut and paste
sample command lines out of man pages in the obvious way then the
things that look like hyphens are not in fact the character that the
program in question would recognise as an option introducer.

git-svn-id: svn://svn.tartarus.org/sgt/halibut@8309 cda61777-01e9-0310-a592-d414129be87e