Document 'git-log --decorate'

Signed-off-by: Michael Hendricks <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: mndrix

Documentation/git-log.txt

@@ -51,6 +51,9 @@ include::pretty-formats.txt[]
 	a record about how the tip of a reference was changed.
 	See also gitlink:git-reflog[1].
 
+--decorate::
+    Print out the ref names of any commits that are shown.
+
 <paths>...::
 	Show only commits that affect the specified paths.