Fix typos in docstring

* code in bin/

* code in nova/api/

Change-Id: Ic643d640b66785d4bb54defcddc3d2312292bfdf

bin/nova-dhcpbridge

@@ -111,7 +111,7 @@ CONF.register_cli_opt(
 
 
 def main():
-    """Parse environment and arguments and call the approproate action."""
+    """Parse environment and arguments and call the appropriate action."""
     try:
         config_file = os.environ['CONFIG_FILE']
     except KeyError:

bin/nova-manage

@@ -205,7 +205,7 @@ class ShellCommands(object):
 
     @args('--path', dest='path', metavar='<path>', help='Script path')
     def script(self, path):
-        """Runs the script from the specifed path with flags set properly.
+        """Runs the script from the specified path with flags set properly.
         arguments: path"""
         exec(compile(open(path).read(), path, 'exec'), locals(), globals())
 

nova/api/ec2/cloud.py

@@ -148,7 +148,7 @@ def _properties_get_mappings(properties):
 
 
 def _format_block_device_mapping(bdm):
-    """Contruct BlockDeviceMappingItemType
+    """Construct BlockDeviceMappingItemType
     {'device_name': '...', 'snapshot_id': , ...}
     => BlockDeviceMappingItemType
     """