rebase -i: remove useless indentation

The commands used to be indented, and it is nice to look at, but when we
transform the SHA-1s, the indentation is removed. So let's do away with it.

For the moment, at least: when we will use the upcoming rebase--helper
to transform the SHA-1s, we *will* keep the indentation and can
reintroduce it. Yet, to be able to validate the rebase--helper against
the output of the current shell script version, we need to remove the
extra indentation.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

git-rebase--interactive.sh

@@ -149,13 +149,13 @@ append_todo_help () {
 	git stripspace --comment-lines >>"$todo" <<\EOF
 
 Commands:
- p, pick = use commit
- r, reword = use commit, but edit the commit message
- e, edit = use commit, but stop for amending
- s, squash = use commit, but meld into previous commit
- f, fixup = like "squash", but discard this commit's log message
- x, exec = run command (the rest of the line) using shell
- d, drop = remove commit
+p, pick = use commit
+r, reword = use commit, but edit the commit message
+e, edit = use commit, but stop for amending
+s, squash = use commit, but meld into previous commit
+f, fixup = like "squash", but discard this commit's log message
+x, exec = run command (the rest of the line) using shell
+d, drop = remove commit
 
 These lines can be re-ordered; they are executed from top to bottom.