In PageTemplate.pt_errors accept the check_macro_expansion argument.

This is added for compatibility with zope.pagetemplate 4.0.0.
The argument is ignored.
See LP #732972.

doc/CHANGES.rst

@@ -8,6 +8,10 @@ http://docs.zope.org/zope2/releases/.
 2.13.20 (unreleased)
 --------------------
 
+- In PageTemplate.pt_errors accept the check_macro_expansion argument.
+  This is added for compatibility with zope.pagetemplate 4.0.0.  The
+  argument is ignored.  See LP #732972.
+
 - Updated distributions:
 
   - Products.ZCTextIndex = 2.13.4

src/Products/PageTemplates/PageTemplate.py

@@ -79,7 +79,10 @@ class PageTemplate(ExtensionClass.Base,
                    showtal=showtal)
 
 
-    def pt_errors(self, namespace={}):
+    def pt_errors(self, namespace={}, check_macro_expansion=None):
+        # The check_macro_expansion argument is added for
+        # compatibility with zope.pagetemplate 4.0.0.  The argument is
+        # ignored.  See LP #732972.
         self._cook_check()
         err = self._v_errors
         if err: