git-log.txt: place each -L option variation on its own line

Standard practice in Git documentation is for each variation of an
option (such as: -p / --porcelain) to be placed on its own line in the
OPTIONS table. The -L option does not follow suit. It cuddles "-L
<start>,<end>:<file>" and "-L :<regex>:<file>", separated by a comma.
This is inconsistent and potentially confusing since the comma
separating them is typeset the same as the comma in "<start>,<end>". Fix
this by placing each variation on its own line.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-log.txt

@@ -62,7 +62,8 @@ produced by --stat etc.
 	Note that only message is considered, if also a diff is shown
 	its size is not included.
 
--L <start>,<end>:<file>, -L :<regex>:<file>::
+-L <start>,<end>:<file>::
+-L :<regex>:<file>::
 
 	Trace the evolution of the line range given by "<start>,<end>"
 	(or the funcname regex <regex>) within the <file>.  You may