Doc: show example scissors line

The text tries to say the code accepts many variations that look remotely
like scissors and perforation marks, but gives too little detail for users
to decide what is and what is not taken as a scissors line for themselves.
Instead of describing the heuristics more, just spell out what will always
be accepted, namely "-- >8 --", as it would not help users to give them
more choices and flexibility and be "creative" in their scissors line.

Signed-off-by: Evan Gates <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: deepcube

Documentation/git-mailinfo.txt

@@ -72,10 +72,9 @@ conversion, even with this flag.
 	is useful in order to associate commits with mailing list discussions.
 
 --scissors::
-	Remove everything in body before a scissors line.  A line that
-	mainly consists of scissors (either ">8" or "8<") and perforation
-	(dash "-") marks is called a scissors line, and is used to request
-	the reader to cut the message at that line.  If such a line
+	Remove everything in body before a scissors line (e.g. "-- >8 --").
+	The line represents scissors and perforation marks, and is used to
+	request the reader to cut the message at that line.  If that line
 	appears in the body of the message before the patch, everything
 	before it (including the scissors line itself) is ignored when
 	this option is used.