fix several typos detected by codespell

swh/core/db/tests/db_testing.py

@@ -45,7 +45,7 @@ def pg_restore(dbname, dumpfile, dumptype='pg_dump'):
     """
     Args:
         dbname: name of the DB to restore into
-        dumpfile: path fo the dump file
+        dumpfile: path of the dump file
         dumptype: one of 'pg_dump' (for binary dumps), 'psql' (for SQL dumps)
     """
     assert dumptype in ['pg_dump', 'psql']

swh/core/tests/test_statsd.py

@@ -175,7 +175,7 @@ class TestStatsd(unittest.TestCase):
         self.statsd.gauge('gauge', 123.4)
         self.assertEqual('foo.gauge:123.4|g', self.recv())
 
-    # Test Client level contant tags
+    # Test Client level constant tags
     def test_gauge_constant_tags(self):
         self.statsd.constant_tags = {
             'bar': 'baz',