keyword: do not inspect node1 for diff if node2 is given

hgext/keyword.py

@@ -123,7 +123,7 b' def _kw_diff(repo, node1=None, node2=Non'
     comparing against working dir.'''
     if node2 is not None:
         kwtools['templater'].matcher = util.never
-    if node1 is not None and node1 != repo.changectx().node():
+    elif node1 is not None and node1 != repo.changectx().node():
         kwtools['templater'].restrict = True
     _patch_diff(repo, node1=node1, node2=node2, files=files, match=match,
                 fp=fp, changes=changes, opts=opts)