Merge branch 'rs/cleanup-strbuf-users'

Code clean-up.

* rs/cleanup-strbuf-users:
  graph: use strbuf_addchars() to add spaces
  use strbuf_addstr() for adding strings to strbufs
  path: use strbuf_add_real_path()

refs/packed-backend.c

@@ -1233,8 +1233,8 @@ static int write_with_updates(struct packed_ref_store *refs,
 	}
 
 	if (ok != ITER_DONE) {
-		strbuf_addf(err, "unable to write packed-refs file: "
-			    "error iterating over old contents");
+		strbuf_addstr(err, "unable to write packed-refs file: "
+			      "error iterating over old contents");
 		goto error;
 	}