From: Junio C Hamano <gits...@pobox.com>

Generally speaking, using more options will further narrow the
selection, but there are a few exceptions.  Document them.

Signed-off-by: Junio C Hamano <gits...@pobox.com>
Signed-off-by: Michael J Gruber <g...@drmicha.warpmail.net>
---
 Documentation/rev-list-options.txt | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/Documentation/rev-list-options.txt 
b/Documentation/rev-list-options.txt
index 1ae3c89..57d6c90 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -3,7 +3,14 @@ Commit Limiting
 
 Besides specifying a range of commits that should be listed using the
 special notations explained in the description, additional commit
-limiting may be applied. Note that they are applied before commit
+limiting may be applied.
+
+Using more options generally further limits the output (e.g.
+"--since=<date1>" limits to commits newer than <date1>, and using it
+with "--grep=<pattern>" further limits to commits whose log message
+has a line that match <pattern>), unless otherwise noted.
+
+Note that these are applied before commit
 ordering and formatting options, such as '--reverse'.
 
 --
@@ -38,16 +45,22 @@ endif::git-rev-list[]
 --committer=<pattern>::
 
        Limit the commits output to ones with author/committer
-       header lines that match the specified pattern (regular expression).
+       header lines that match the specified pattern (regular
+       expression).  With more than one `--author=<pattern>`,
+       commits whose author match any of the given patterns are
+       chosen (similarly for multiple `--committer=<pattern>`).
 
 --grep=<pattern>::
 
        Limit the commits output to ones with log message that
-       matches the specified pattern (regular expression).
+       matches the specified pattern (regular expression).  With
+       more than one `--grep=<pattern>`, commits whose message
+       match any of the given patterns are chosen (but see
+       `--all-match`).
 
 --all-match::
        Limit the commits output to ones that match all given --grep,
-       --author and --committer instead of ones that match at least one.
+       instead of ones that match at least one.
 
 -i::
 --regexp-ignore-case::
-- 
1.7.12.592.g41e7905

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