Merge branch 'mh/replace-refs-variable-rename'

* mh/replace-refs-variable-rename:
  Document some functions defined in object.c
  Add docstrings for lookup_replace_object() and do_lookup_replace_object()
  rename read_replace_refs to check_replace_refs

builtin/replace.c

@@ -178,7 +178,7 @@ int cmd_replace(int argc, const char **argv, const char *prefix)
 		OPT_END()
 	};
 
-	read_replace_refs = 0;
+	check_replace_refs = 0;
 
 	argc = parse_options(argc, argv, prefix, options, git_replace_usage, 0);