gnome-doc-utils string unchange

[Shaun McCance <shaunm gmail com>]

Last night, I wrapped the string ", " with a msgstr element to
prevent whitespace mangling.  Danilo pointed out that intltool
respects the xml:space attribute, so I've taken out the wrapper
msgstr, put in an xml:space, and left in the expanded comment. :)

--
Shaun