git-commit-graph.txt: fix bullet lists

We have a couple of bullet items which span multiple lines, and where we
have prefixed each line with a `*`. (This might be the result of a text
editor trying to help.) This results in each line being typeset as a
separate bullet item. Drop the extra `*`.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Reviewed-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-commit-graph.txt

@@ -73,7 +73,7 @@ $ git commit-graph write
 ------------------------------------------------
 
 * Write a graph file, extending the current graph file using commits
-* in <pack-index>.
+  in <pack-index>.
 +
 ------------------------------------------------
 $ echo <pack-index> | git commit-graph write --stdin-packs
@@ -86,7 +86,7 @@ $ git show-ref -s | git commit-graph write --stdin-commits
 ------------------------------------------------
 
 * Write a graph file containing all commits in the current
-* commit-graph file along with those reachable from HEAD.
+  commit-graph file along with those reachable from HEAD.
 +
 ------------------------------------------------
 $ git rev-parse HEAD | git commit-graph write --stdin-commits --append