Enable H402 style check

Full stop at the end of single-line docstring.

Change-Id: I9f24dbe0666069800979758d3628ed4f7fc4979b

heat/engine/dependencies.py

@@ -261,9 +261,9 @@ class Dependencies(object):
             return self._graph.copy()
 
     def __iter__(self):
-        '''Return a topologically sorted iterator'''
+        '''Return a topologically sorted iterator.'''
         return Graph.toposort(self.graph())
 
     def __reversed__(self):
-        '''Return a reverse topologically sorted iterator'''
+        '''Return a reverse topologically sorted iterator.'''
         return Graph.toposort(self.graph(reverse=True))

heat/engine/parameters.py

@@ -276,7 +276,7 @@ class Parameter(object):
         self.user_default = value
 
     def __str__(self):
-        '''Return a string representation of the parameter'''
+        '''Return a string representation of the parameter.'''
         value = self.value()
         if self.hidden():
             return '******'
@@ -288,11 +288,11 @@ class NumberParam(Parameter):
     '''A template parameter of type "Number".'''
 
     def __int__(self):
-        '''Return an integer representation of the parameter'''
+        '''Return an integer representation of the parameter.'''
         return int(super(NumberParam, self).value())
 
     def __float__(self):
-        '''Return a float representation of the parameter'''
+        '''Return a float representation of the parameter.'''
         return float(super(NumberParam, self).value())
 
     def _validate(self, val, context):

heat/tests/test_hot.py

@@ -1173,7 +1173,7 @@ class StackParametersTest(common.HeatTestCase):
 
 
 class HOTParamValidatorTest(common.HeatTestCase):
-    """Test HOTParamValidator"""
+    """Test HOTParamValidator."""
 
     def test_multiple_constraint_descriptions(self):
         len_desc = 'string length should be between 8 and 16'

tox.ini

@@ -54,12 +54,11 @@ commands = oslo-config-generator --config-file=config-generator.conf
 [flake8]
 # H305 imports not grouped correctly
 # H307 like imports should be grouped togethe
-# H402 one line docstring needs punctuation
 # H404 multi line docstring should start with a summary
 # H405 multi line docstring summary not separated with an empty line
 # H803 no full stop at the end of the commit message
 # H904 Wrap long lines in parentheses instead of a backslash
-ignore = H305,H307,H402,H404,H405,H803,H904
+ignore = H305,H307,H404,H405,H803,H904
 show-source = true
 exclude=.venv,.git,.tox,dist,*openstack/common*,*lib/python*,*egg,tools,build
 max-complexity=20