tests/test-extension.t

--- a/tests/test-extension.t	Sun Mar 18 23:36:52 2018 +0900
+++ b/tests/test-extension.t	Thu Mar 15 22:27:16 2018 +0900
@@ -1407,6 +1407,11 @@
   $ hg version -q --config extensions.throw=throw.py
   Mercurial Distributed SCM (version *) (glob)
 
+Test template output:
+
+  $ hg version --config extensions.strip= -T'{extensions}'
+  strip
+
 Test JSON output of version:
 
   $ hg version -Tjson