# HG changeset patch
# User Yuya Nishihara <yuya@tcha.org>
# Date 2018-03-20 14:16:28
# Node ID 9cd88dd3bf64a1b3a6b7b72a8fe93e0e4e9118e0
# Parent  41a5d815d2c1b6ca086fe7540f3f263ea589aa95

templater: micro-optimize join() with empty separator

diff --git a/mercurial/templateutil.py b/mercurial/templateutil.py
--- a/mercurial/templateutil.py
+++ b/mercurial/templateutil.py
@@ -558,6 +558,6 @@ def joinitems(itemiter, sep):
     for x in itemiter:
         if first:
             first = False
-        else:
+        elif sep:
             yield sep
         yield x