Your bug report

#17185: diff --help doesn't mention short forms of some options

which was filed against the diffutils package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 17185@debbugs.gnu.org.

-- 
17185: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17185
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