[PATCH 2 of 7] py3: rewrite itervalues() as values() by importer

[Yuya Nishihara]

# HG changeset patch
# User Yuya Nishihara <yuya at tcha.org>
# Date 1489419897 25200
#      Mon Mar 13 08:44:57 2017 -0700
# Node ID c9700b5cb641c10d8b0e6ac90896ebe5cb7c0658
# Parent  b7717d4dc60bcc3a3f4b7b85476954357f52783b
py3: rewrite itervalues() as values() by importer

I'm not a great fan of these importer magics, but this should be okay since
"itervalues" seems as unique name as "iteritems".

diff --git a/mercurial/__init__.py b/mercurial/__init__.py
--- a/mercurial/__init__.py
+++ b/mercurial/__init__.py
@@ -310,10 +310,10 @@ if sys.version_info[0] >= 3:
                         if argidx is not None:
                             _ensureunicode(argidx)
 
-                # It changes iteritems to items as iteritems is not
+                # It changes iteritems/values to items/values as they are not
                 # present in Python 3 world.
-                elif fn == 'iteritems':
-                    yield t._replace(string='items')
+                elif fn in ('iteritems', 'itervalues'):
+                    yield t._replace(string=fn[4:])
                     continue
 
             # Emit unmodified token.
@@ -323,7 +323,7 @@ if sys.version_info[0] >= 3:
     # ``replacetoken`` or any mechanism that changes semantics of module
     # loading is changed. Otherwise cached bytecode may get loaded without
     # the new transformation mechanisms applied.
-    BYTECODEHEADER = b'HG\x00\x08'
+    BYTECODEHEADER = b'HG\x00\x09'
 
     class hgloader(importlib.machinery.SourceFileLoader):
         """Custom module loader that transforms source code.