test: add a small comment to explain a section of test-devel-warning
This makes each test boundaries clearer.
--- a/tests/test-devel-warnings.t Wed Jun 28 03:54:19 2017 +0200
+++ b/tests/test-devel-warnings.t Sun Jul 02 01:37:03 2017 +0200
@@ -104,6 +104,8 @@
$ hg properlocking
$ hg nowaitlocking
+Stripping from a transaction
+
$ echo a > a
$ hg add a
$ hg commit -m a