$ echo 'line 2' >> file1
$ hg diff
diff -r file1
@@ -1,1 +1,2 @@
line 1
+line 2
$ hg qrefresh
$ hg diff
$ hg tip --style=compact --patch
1[qtip,first.patch,tip,qbase] 2009-03-10 04:38 +0000 bos
[mq]: first.patch
diff -r -r file1
@@ -1,1 +1,2 @@
line 1
+line 2