refs.c: indent with tabs, not spaces

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/refs.c b/refs.c
index a7a75b4..9f7268d 100644
--- a/refs.c
+++ b/refs.c
@@ -646,7 +646,7 @@ enum ref_type ref_type(const char *refname)
 		return REF_TYPE_PER_WORKTREE;
 	if (is_pseudoref_syntax(refname))
 		return REF_TYPE_PSEUDOREF;
-       return REF_TYPE_NORMAL;
+	return REF_TYPE_NORMAL;
 }
 
 long get_files_ref_lock_timeout_ms(void)