minor spelling fixes

deform/field.py

@@ -188,7 +188,7 @@ def parent(self):
         return self._parent()
 
     def get_root(self):
-        """ Return the root field in the field herarchy (the form field) """
+        """ Return the root field in the field hierarchy (the form field) """
         node = self
         while True:
             parent = node.parent
@@ -277,7 +277,7 @@ def clone(self):
         information.  Return the cloned field.  The ``order``
         attribute of the node is not cloned; instead the field
         receives a new order attribute; it will be a number larger
-        than the last renderered field of this set.  The parent of the cloned
+        than the last rendered field of this set.  The parent of the cloned
         node will become ``None`` unconditionally."""
         cloned = self.__class__(self.schema)
         cloned.__dict__.update(self.__dict__)
@@ -337,7 +337,7 @@ def get_widget_requirements(self):
         the form rendering in order for some widget on the page to
         function properly.
 
-        The second element in each two-tuple is the reqested version
+        The second element in each two-tuple is the requested version
         of the library resource.  It may be ``None``, in which case
         the version is unspecified.