git-commit-graph.txt: typeset more in monospace

While we're here, fix an instance of "folder" to be "directory".

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

@@ -25,9 +25,9 @@ OPTIONS
 --object-dir::
 	Use given directory for the location of packfiles and commit graph
 	file. This parameter exists to specify the location of an alternate
-	that only has the objects directory, not a full .git directory. The
+	that only has the objects directory, not a full `.git` directory. The
-	commit graph file is expected to be at <dir>/info/commit-graph and
+	commit graph file is expected to be at `<dir>/info/commit-graph` and
-	the packfiles are expected to be in <dir>/pack.
+	the packfiles are expected to be in `<dir>/pack`.
 
 
 COMMANDS
@@ -66,14 +66,15 @@ database. Used to check for corrupted data.
 EXAMPLES
 --------
 
-* Write a commit graph file for the packed commits in your local .git folder.
+* Write a commit graph file for the packed commits in your local `.git`
+  directory.
 +
 ------------------------------------------------
 $ 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 +87,7 @@ $ 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