[PATCH] git-filter-branch.txt: Add picture to explain the graft-id

[Jari Aalto <jari.aalto@cante.net>]

Present a picture to demonstrate the positions of graft-id and
commit-id in case of merging A with B.

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
---
 Documentation/git-filter-branch.txt |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

 I'd like to thank Mikael Magnusson explaining this.

diff --git a/Documentation/git-filter-branch.txt b/Documentation/git-filter-branch.txt
index 543a1cf..73939e2 100644
--- a/Documentation/git-filter-branch.txt
+++ b/Documentation/git-filter-branch.txt
@@ -186,7 +186,7 @@ Now, you will get the rewritten history saved in HEAD.
 
 To set a commit (which typically is at the tip of another
 history) to be the parent of the current initial commit, in
-order to paste the other history behind the current history:
+order to paste the other history behind the current history.
 
 -------------------------------------------------------------------
 git filter-branch --parent-filter 'sed "s/^\$/-p <graft-id>/"' HEAD
@@ -198,6 +198,12 @@ history with a single root (that is, no merge without common ancestors
 happened).  If this is not the case, use:
 
 --------------------------------------------------------------------------
+
+    The plan: supposing we're merging A with B
+    commit sequence A: a-b-c			graft-id  = b
+    commit sequence B: c'-d'-e'			commit-id = c'
+    Result	     : a-b-c'-d'-e'
+
 git filter-branch --parent-filter \
 	'test $GIT_COMMIT = <commit-id> && echo "-p <graft-id>" || cat' HEAD
 --------------------------------------------------------------------------
-- 
1.5.3.8


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