documentation: trivial style cleanups

White-spaces, missing braces, standardize --[no-]foo.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git-mailinfo.txt b/Documentation/git-mailinfo.txt
index 97e7a8e..164a3c6 100644
--- a/Documentation/git-mailinfo.txt
+++ b/Documentation/git-mailinfo.txt
@@ -9,7 +9,7 @@
 SYNOPSIS
 --------
 [verse]
-'git mailinfo' [-k|-b] [-u | --encoding=<encoding> | -n] [--scissors] <msg> <patch>
+'git mailinfo' [-k|-b] [-u | --encoding=<encoding> | -n] [--[no-]scissors] <msg> <patch>
 
 
 DESCRIPTION