lock_ref_for_update(): don't re-read non-symbolic references

[git] / t / t4135 / add-with tab.diff

diff -pruN a/post       image.txt b/post        image.txt
--- a/post      image.txt       1969-12-31 18:00:00.000000000 -0600
+++ b/post      image.txt       2010-08-18 20:13:31.628002255 -0500
@@ -0,0 +1 @@
+postimage