Trivial fix typos

Change-Id: I7e1e3b2f92183b2a249299659f0778fe838212e2

swift/common/ring/composite_builder.py

@@ -154,7 +154,7 @@ def pre_validate_all_builders(builders):
         if inter:
             raise ValueError('Same region found in different rings')
 
-    # check device uniquness
+    # check device uniqueness
     check_for_dev_uniqueness(builders)
 
 

test/probe/brain.py

@@ -96,7 +96,7 @@ class BrainSplitter(object):
             policy.load_ring('/etc/swift')
             self.ring = policy.object_ring
         else:
-            raise ValueError('Unkonwn server_type: %r' % server_type)
+            raise ValueError('Unknown server_type: %r' % server_type)
         self.server_type = server_type
 
         part, nodes = self.ring.get_nodes(self.account, c, o)

test/probe/test_replication_servers_working.py

@@ -55,7 +55,7 @@ def find_max_occupancy_node(dir_list):
     """
     Find node with maximum occupancy.
 
-    :param list_dir: list of directories for each node.
+    :param dir_list: list of directories for each node.
     :return: number number node in list_dir
     """
     count = 0