From: Sverre Hvammen Johansen <hvammen@gmail.com>

Added some documentation for how git-merge currently
works when more than two histories are joined.

Signed-off-by: Sverre Hvammen Johansen <hvammen@gmail.com>
---
 Documentation/git-merge.txt |   36 ++++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/Documentation/git-merge.txt b/Documentation/git-merge.txt
index ef1f055..5924c1a 100644
--- a/Documentation/git-merge.txt
+++ b/Documentation/git-merge.txt
@@ -151,6 +151,42 @@ After seeing a conflict, you can do two things:
    should be, and run `git-commit` to commit the result.
 
 
+JOINING MORE THAN TWO HISTORIES
+-------------------------------
+
+More than one remote may be specified on the command line.  Those
+remotes are used for selecting the merge startegy and is also used in
+the merge commit message.  However, some of these remotes may not be
+independent.  Only remotes with independent heads (reduced parents)
+will be recorded in the merge commit object.
+
+The following shows master and two topic branches.  topicB is based
+on topicA, topicA is previously branched off from master:
+
+------------
+		    o---o---o  topicB
+		   /
+	  o---o---o  topicA
+	 /
+    o---o---o---o---o---o---o  master
+
+------------
+
+Merging topicA and topicB to the master branch will select the merge
+strategy based on all three branches (an Octopus).  master and topicB
+are the reduced parents and are therefore the only parents recorded in
+the merge commit object:
+
+------------
+
+		    o---o---o  topicB
+		   /         \
+	  o---o---o  topicA   o  master
+	 /                   /
+    o---o---o---o---o---o---o
+
+------------
+
 SEE ALSO
 --------
 linkgit:git-fmt-merge-msg[1], linkgit:git-pull[1],
-- 
1.5.5.1.499.g878b8

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