[PATCH] tags: rename "head" to "node" where we don't care

[Martin von Zweigbergk]

# HG changeset patch
# User Martin von Zweigbergk <martinvonz at google.com>
# Date 1491238898 25200
#      Mon Apr 03 10:01:38 2017 -0700
# Node ID 4c62d47c4cf11da5127e9ded4b060c8723269723
# Parent  ac69675fff1caacf143ab7f0bda668e6e325670a
tags: rename "head" to "node" where we don't care

Followup to 5eb4d206202b (tags: extract fnode retrieval into its own
function, 2017-03-28) in which the "for head in head" became "for head
in nodes".

diff -r ac69675fff1c -r 4c62d47c4cf1 mercurial/tags.py
--- a/mercurial/tags.py	Wed Mar 29 21:43:38 2017 +0900
+++ b/mercurial/tags.py	Mon Apr 03 10:01:38 2017 -0700
@@ -380,10 +380,10 @@
     starttime = util.timer()
     fnodescache = hgtagsfnodescache(repo.unfiltered())
     cachefnode = {}
-    for head in reversed(nodes):
-        fnode = fnodescache.getfnode(head)
+    for node in reversed(nodes):
+        fnode = fnodescache.getfnode(node)
         if fnode != nullid:
-            cachefnode[head] = fnode
+            cachefnode[node] = fnode
 
     fnodescache.write()