Fix typos in docstrings and comments

Change-Id: Ic2dc057dca87212f715970f8325956c42f62ea9f

openstackclient/api/api.py

@@ -331,7 +331,7 @@ class BaseAPI(KeystoneSession):
 
         :param string path:
             The API-specific portion of the URL path
-        :param string search:
+        :param string value:
             search expression
         :param string attr:
             name of attribute for secondary search

openstackclient/api/utils.py

@@ -29,7 +29,7 @@ def simple_filter(
         The name of the attribute to filter.  If attr does not exist no
         match will succeed and no rows will be returned.  If attr is
         None no filtering will be performed and all rows will be returned.
-    :param sring value:
+    :param string value:
         The value to filter.  None is considered to be a 'no filter' value.
         '' matches against a Python empty string.
     :param string property_field:

openstackclient/network/v2/subnet.py

@@ -95,7 +95,7 @@ def convert_entries_to_nexthop(entries):
 
 
 def convert_entries_to_gateway(entries):
-    # Change 'nexhop' entry to 'gateway'
+    # Change 'nexthop' entry to 'gateway'
     changed_entries = copy.deepcopy(entries)
     for entry in changed_entries:
         entry['gateway'] = entry['nexthop']