docs: correctly reference logging.Logger type

Author: larkee

google/cloud/spanner_v1/database.py

@@ -103,7 +103,7 @@ class Database(object):
                  passed, the database will construct an instance of
                  :class:`~google.cloud.spanner_v1.pool.BurstyPool`.
 
-    :type logger: `logging.Logger`
+    :type logger: :class:`logging.Logger`
     :param logger: (Optional) a custom logger that is used if `log_commit_stats`
                    is `True` to log commit statistics. If not passed, a logger
                    will be created when needed that will log the commit statistics

google/cloud/spanner_v1/instance.py

@@ -371,7 +371,7 @@ def database(self, database_id, ddl_statements=(), pool=None, logger=None):
                     :class:`~google.cloud.spanner_v1.pool.AbstractSessionPool`.
         :param pool: (Optional) session pool to be used by database.
 
-        :type logger: `logging.Logger`
+        :type logger: :class:`logging.Logger`
         :param logger: (Optional) a custom logger that is used if `log_commit_stats`
                        is `True` to log commit statistics. If not passed, a logger
                        will be created when needed that will log the commit statistics