Avoid UnicodeEncodeError if a path contains invalid characters

CHANGES.rst

@@ -4,7 +4,9 @@ Changelog
 1.4.2 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- ``plone.app.transmogrifier.pathfixer`` now also converts a path into ``str`` and removes any invalid characters from it;
+  this avoids ``UnicodeEncodeError`` in many blueprint sections.
+  [hvelarde]
 
 
 1.4.1 (2018-02-27)

src/plone/app/transmogrifier/pathfixer.py

@@ -59,6 +59,7 @@ def __iter__(self):
             if prependstring:
                 path = '%s%s' % (prependstring, path)
 
-            item[pathkey] = path
+            # convert the path to str and remove invalid characters
+            item[pathkey] = path.encode('ascii', 'ignore')
 
             yield item

src/plone/app/transmogrifier/pathfixer.rst

@@ -6,6 +6,8 @@ root may have changed. This blueprint updates the old paths to match the new
 structrue by removing or appending strings from the right side of the path
 value.
 
+It also converts the path to ``str`` and removes any invalid characters from it.
+
 Blueprint name: ``plone.app.transmogrifier.pathfixer``
 
 Option path-key: The key of the item under which the path to be manipulated can