docs/184791: [patch] man page for 'diff3' references 'info diff' instead of 'info diff3'

[wblock at FreeBSD.org]

Synopsis: [patch] man page for 'diff3' references 'info diff' instead of 'info diff3'

Responsible-Changed-From-To: freebsd-doc->wblock
Responsible-Changed-By: wblock
Responsible-Changed-When: Sun Jan 5 23:19:43 UTC 2014
Responsible-Changed-Why: 
Take.

http://www.freebsd.org/cgi/query-pr.cgi?pr=184791