py3: alias long to int on Python 3

mercurial/templatefilters.py

@@ -16,6 +16,7 b' from . import ('
     encoding,
     hbisect,
     node,
+    pycompat,
     registrar,
     templatekw,
     util,
@@ -24,6 +25,9 b' from . import ('
 urlerr = util.urlerr
 urlreq = util.urlreq
 
+if pycompat.ispy3:
+    long = int
+
 # filters are callables like:
 #   fn(obj)
 # with: