--- a/src/pyams_utils/list.py	Wed Nov 20 19:26:23 2019 +0100
+++ b/src/pyams_utils/list.py	Fri Nov 22 18:51:37 2019 +0100
@@ -20,8 +20,6 @@
 iterator).
 """
 
-__docformat__ = 'restructuredtext'
-
 from itertools import filterfalse, tee
 from random import random, shuffle
 
@@ -31,14 +29,17 @@
 from pyams_utils.interfaces.tales import ITALESExtension
 
 
+__docformat__ = 'restructuredtext'
+
+
 def unique(seq, key=None):
     """Extract unique values from list, preserving order
 
     :param iterator seq: input list
     :param callable key: an identity function which is used to get 'identity' value of each element
         in the list
-    :return: list; a new list containing only unique elements of the original list in their initial order.
-        Original list is not modified.
+    :return: list; a new list containing only unique elements of the original list in their initial
+        order. Original list is not modified.
 
     >>> from pyams_utils.list import unique
     >>> mylist = [1, 2, 3, 2, 1]
@@ -173,7 +174,8 @@
     return next(values), values
 
 
-@adapter_config(name='boolean_iter', context=(Interface, Interface, Interface), provides=ITALESExtension)
+@adapter_config(name='boolean_iter', context=(Interface, Interface, Interface),
+                provides=ITALESExtension)
 class IterValuesCheckerExpression(ContextRequestViewAdapter):
     """TALES expression used to handle iterators
 
@@ -182,6 +184,7 @@
     """
 
     def render(self, context=None):
+        """Render TALES extension; see `ITALESExtension` interface"""
         if context is None:
             context = self.context
         return boolean_iter(context)