Adds empty line to multilines docs to pass H405

Adds empty line to multilines docs to pass H405 check.
Removes H405 from ignore setting in tox.ini.

Change-Id: I0516fb12765bf961a4488570a6c73b80f667d972

oslo/db/sqlalchemy/exc_filters.py

@@ -226,9 +226,10 @@ def _db2_dupe_key_error(integrity_error, match, engine_name, is_disconnect):
 @filters("mysql", sqla_exc.DBAPIError, r".*\b1146\b")
 def _raise_mysql_table_doesnt_exist_asis(
         error, match, engine_name, is_disconnect):
-    """Raise MySQL error 1146 as is, so that it does not conflict with
-    the MySQL dialect's checking a table not existing.
+    """Raise MySQL error 1146 as is.
 
+    Raise MySQL error 1146 as is, so that it does not conflict with
+    the MySQL dialect's checking a table not existing.
     """
 
     raise error
@@ -237,9 +238,10 @@ def _raise_mysql_table_doesnt_exist_asis(
 @filters("*", sqla_exc.OperationalError, r".*")
 def _raise_operational_errors_directly_filter(operational_error,
     match, engine_name, is_disconnect):
-    """Filter for all remaining OperationalError classes and apply
-    special rules.
+    """Filter for all remaining OperationalError classes and apply.
 
+    Filter for all remaining OperationalError classes and apply
+    special rules.
     """
     if is_disconnect:
         # operational errors that represent disconnect
@@ -262,9 +264,10 @@ def _is_db_connection_error(operational_error, match, engine_name,
 
 @filters("*", sqla_exc.DBAPIError, r".*")
 def _raise_for_remaining_DBAPIError(error, match, engine_name, is_disconnect):
-    """Filter for remaining DBAPIErrors and wrap if they represent
-    a disconnect error.
+    """Filter for remaining DBAPIErrors.
 
+    Filter for remaining DBAPIErrors and wrap if they represent
+    a disconnect error.
     """
     if is_disconnect:
         raise exception.DBConnectionError(error)
@@ -327,9 +330,10 @@ def register_engine(engine):
 
 
 def handle_connect_error(engine):
-    """Provide a special context that will allow on-connect errors
-    to be raised within the filtering context.
+    """Handle connect error.
 
+    Provide a special context that will allow on-connect errors
+    to be raised within the filtering context.
     """
     try:
         return engine.connect()

oslo/db/sqlalchemy/session.py

@@ -338,9 +338,10 @@ def _thread_yield(dbapi_con, con_record):
 
 
 def _begin_ping_listener(connection):
-    """Ping the server at transaction begin and transparently reconnect
-    if a disconnect exception occurs.
+    """Ping the server at transaction begin.
 
+    Ping the server at transaction begin and transparently reconnect
+    if a disconnect exception occurs.
     """
     try:
         # run a SELECT 1.   use a core select() so that
@@ -531,9 +532,10 @@ def get_maker(engine, autocommit=True, expire_on_commit=False):
 
 
 def _add_trace_comments(engine):
-    """Augment statements with a trace of the immediate calling code
-    for a given statement.
+    """Add trace comments.
 
+    Augment statements with a trace of the immediate calling code
+    for a given statement.
     """
 
     import os

tests/sqlalchemy/test_exc_filters.py

@@ -144,7 +144,9 @@ class TestFallthroughsAndNonDBAPI(TestsExceptionFilter):
             matched.message)
 
     def test_operational_error_asis(self):
-        """test that SQLAlchemy OperationalErrors that aren't disconnects
+        """Test operational errors.
+
+        test that SQLAlchemy OperationalErrors that aren't disconnects
         are passed through without wrapping.
         """
 
@@ -504,8 +506,9 @@ class IntegrationTest(test_base.DbTestCase):
         self.assertRaises(exception.DBDuplicateEntry, _session.flush)
 
     def test_autoflush_wrapper_duplicate_entry(self):
-        """test a duplicate entry exception raised via
-        query.all()-> autoflush
+        """Test a duplicate entry exception raised.
+
+        test a duplicate entry exception raised via query.all()-> autoflush
         """
 
         _session = self.sessionmaker()

tests/sqlalchemy/test_migrate_cli.py

@@ -37,14 +37,17 @@ class TestAlembicExtension(test_base.BaseTestCase):
         super(TestAlembicExtension, self).setUp()
 
     def test_check_enabled_true(self, command):
-        """Verifies that enabled returns True on non empty
+        """Check enabled returns True
+
+        Verifies that enabled returns True on non empty
         alembic_ini_path conf variable
         """
         self.assertTrue(self.alembic.enabled)
 
     def test_check_enabled_false(self, command):
-        """Verifies enabled returns False on empty
-        alembic_ini_path variable
+        """Check enabled returns False
+
+        Verifies enabled returns False on empty alembic_ini_path variable
         """
         self.migration_config['alembic_ini_path'] = ''
         alembic = ext_alembic.AlembicExtension(self.migration_config)

tests/sqlalchemy/test_sqlalchemy.py

@@ -183,6 +183,7 @@ class MySQLStrictAllTablesModeTestCase(MySQLModeTestCase):
 
 class MySQLTraditionalModeTestCase(MySQLStrictAllTablesModeTestCase):
     """Test data integrity enforcement in MySQL TRADITIONAL mode.
+
     Since TRADITIONAL includes STRICT_ALL_TABLES, this inherits all
     STRICT_ALL_TABLES mode tests.
     """

tox.ini

@@ -45,7 +45,7 @@ commands =
 # see https://bugs.launchpad.net/hacking/+bug/1329363
 
 show-source = True
-ignore = E123,E125,E128,E265,H305,H307,H405,H703,H803,H904
+ignore = E123,E125,E128,E265,H305,H307,H703,H803,H904
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build