Fix 'Date' appearing twice on the date line.
Don't generate API docs for prefs.h, toolbar.h (unused).
Move some '@file' doc-comments to the .c file.



git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@4772 ea778897-0a13-0410-b9d1-a72fbfd435f5