[PATCH] filter-branch documentation: some more touch-ups.

[Johannes Sixt <johannes.sixt@telecom.at>]

- The map function used to fail, but no longer does (since 3520e1e8687.)
- Fix the "edge-graft" example.
- Show the same using .git/info/grafts.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
---

I think that "edge-graft" makes more sense than "etch-graft".
Native speakers, please?

I tried the example, and its quoting was incorrect. The reason is that
the shell removes the single quotes even if they are in the middle of
a word; so they didn't end up in the eval'd script and made sed barf.

-- Hannes

 Documentation/git-filter-branch.txt |   20 ++++++++++++++------
 1 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/Documentation/git-filter-branch.txt b/Documentation/git-filter-branch.txt
index ee60a1a..528ccc8 100644
--- a/Documentation/git-filter-branch.txt
+++ b/Documentation/git-filter-branch.txt
@@ -57,8 +57,9 @@ variables are set before the first filter is run.
 
 A 'map' function is available that takes an "original sha1 id" argument
 and outputs a "rewritten sha1 id" if the commit has been already
-rewritten, fails otherwise; the 'map' function can return several
-ids on separate lines if your commit filter emitted multiple commits.
+rewritten, and "original sha1 id" otherwise; the 'map' function can
+return several ids on separate lines if your commit filter emitted
+multiple commits.
 
 
 OPTIONS
@@ -164,12 +165,12 @@ git filter-branch --index-filter 'git update-index --remove filename' newbranch
 Now, you will get the rewritten history saved in the branch 'newbranch'
 (your current branch is left untouched).
 
-To "etch-graft" a commit to the revision history (set a commit to be
+To "edge-graft" a commit to the revision history (set a commit to be
 the parent of the current initial commit and propagate that):
 
-----------------------------------------------------------------------
-git filter-branch --parent-filter sed\ 's/^$/-p <graft-id>/' newbranch
-----------------------------------------------------------------------
+------------------------------------------------------------------------
+git filter-branch --parent-filter 'sed "s/^\$/-p <graft-id>/"' newbranch
+------------------------------------------------------------------------
 
 (if the parent string is empty - therefore we are dealing with the
 initial commit - add graftcommit as a parent).  Note that this assumes
@@ -181,6 +182,13 @@ git filter-branch --parent-filter \
 	'cat; test $GIT_COMMIT = <commit-id> && echo "-p <graft-id>"' newbranch
 -------------------------------------------------------------------------------
 
+or even simpler:
+
+-----------------------------------------------
+echo "$commit-id $graft-id" >> .git/info/grafts
+git filter-branch newbranch $graft-id..
+-----------------------------------------------
+
 To remove commits authored by "Darl McBribe" from the history:
 
 ------------------------------------------------------------------------------
-- 
1.5.3.rc0.5.g7cd9