[PATCH 2 of 5] show: avoid extra list operations

[Gregory Szorc]

# HG changeset patch
# User Gregory Szorc <gregory.szorc at gmail.com>
# Date 1499141524 25200
#      Mon Jul 03 21:12:04 2017 -0700
# Node ID f2c118798d8bd214679f9a6ad3f8f4f87882d9d3
# Parent  0cacc533e884965d93b426c6805a55097010dcbe
show: avoid extra list operations

diff --git a/hgext/show.py b/hgext/show.py
--- a/hgext/show.py
+++ b/hgext/show.py
@@ -219,7 +219,7 @@ def showstack(ui, repo, displayer):
             branchpointattip = True
             break
 
-    stackrevs = list(reversed(sorted(stackrevs)))
+    stackrevs = list(sorted(stackrevs, reverse=True))
 
     # Find likely target heads for the current stack. These are likely
     # merge or rebase targets.