modify grammatical errors

Change-Id: I4caeba85d880c5f0456efeac963ea9d792180498

FEATURES.rst

@@ -170,7 +170,7 @@ User Defined Actions
 
 Actions in Senlin are mostly built-in ones at present. There are requirements
 to incorporate Shell scripts and/or other structured software configuration
-tools into the whole picture. One of the option is to provide a easy way for
+tools into the whole picture. One of the option is to provide an easy way for
 Senlin to work with Ansible, for example.
 
 

api-ref/source/parameters.yaml

@@ -308,7 +308,7 @@ action_data:
   in: body
   required: True
   description: |
-    A structured representation of data associated with a action object.
+    A structured representation of data associated with an action object.
 
 action_id:
   type: UUID

doc/specs/workflow-recover.rst

@@ -62,7 +62,7 @@ The proposed change will include three parts:
             host: Target_host
 
 * example: to add sample workflow definitions and health policy for Senlin
-           users to create a end2end story.
+           users to create an end2end story.
 
 Alternatives
 ------------

senlin/db/api.py

@@ -397,7 +397,7 @@ def action_abandon(context, action_id, values=None):
 
 
 def action_lock_check(context, action_id, owner=None):
-    '''Check whether an action has been locked(by a owner).'''
+    '''Check whether an action has been locked(by an owner).'''
     return IMPL.action_lock_check(context, action_id, owner)
 
 

senlin/engine/health_manager.py

@@ -161,7 +161,7 @@ class HeatNotificationEndpoint(object):
 
 
 def ListenerProc(exchange, project_id, cluster_id, recover_action):
-    """Thread procedure for running a event listener.
+    """Thread procedure for running an event listener.
 
     :param exchange: The control exchange for a target service.
     :param project_id: The ID of the project to filter.

senlin/policies/affinity_policy.py

@@ -199,7 +199,7 @@ class AffinityPolicy(base.Policy):
         :returns: When the operation was successful, returns a tuple of
                   (True, data) where the data contains references to the
                   resources created; otherwise returns a tuple of (False,
-                  error) where the err contains a error message.
+                  error) where the err contains an error message.
         """
 
         reason = _('Servergroup resource deletion succeeded.')

senlin/policies/lb_policy.py

@@ -395,7 +395,7 @@ class LoadBalancingPolicy(base.Policy):
         :returns: When the operation was successful, returns a tuple of
             (True, data) where the data contains references to the resources
             created; otherwise returns a tuple of (False, err) where the err
-            contains a error message.
+            contains an error message.
         """
         reason = _('LB resources deletion succeeded.')
         lb_driver = self.lbaas(cluster.user, cluster.project)