[PATCH] Improve git-log documentation wrt file filters

["martin f. krafft" <madduck@madduck.net>]

The need for "--" in the git-log synopsis was previously unclear and
confusing. This patch makes it a little clearer.

Thanks to hyy <yiyihu@gmail.com> for his help.

Signed-off-by: martin f. krafft <madduck@madduck.net>
---
 Documentation/git-log.txt |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/Documentation/git-log.txt b/Documentation/git-log.txt
index 0446bad..5a3a625 100644
--- a/Documentation/git-log.txt
+++ b/Documentation/git-log.txt
@@ -8,7 +8,7 @@ git-log - Show commit logs
 
 SYNOPSIS
 --------
-'git log' <option>...
+'git log' [<options>] [<since>..<until>] [[--] <path>...]
 
 DESCRIPTION
 -----------
@@ -57,8 +57,10 @@ include::diff-options.txt[]
 	Note that only message is considered, if also a diff is shown
 	its size is not included.
 
-<path>...::
-	Show only commits that affect any of the specified paths.
+[--] <path>...::
+	Show only commits that affect any of the specified paths. To
+	prevent confusion with options and branch names, paths may need to be
+	prefixed with "-- " to separate them from options or refnames.
 
 
 include::rev-list-options.txt[]
-- 
1.5.6.5