diffhelpers: move out of pure package

mercurial/diffhelpers.py

@@ -1,4 +1,4 b''
-# diffhelpers.py - pure Python implementation of diffhelpers.c
+# diffhelpers.py - helper routines for patch
 #
 # Copyright 2009 Matt Mackall <[e-mail]> and others
 #

mercurial/patch.py

@@ -28,6 +28,7 b' from .node import ('
 )
 from . import (
     copies,
+    diffhelpers,
     encoding,
     error,
     mail,
@@ -39,7 +40,6 b' from . import ('
     util,
     vfs as vfsmod,
 )
-from .pure import diffhelpers
 from .utils import (
     dateutil,
     procutil,