add .tables to CLI_COMMANDS in _completer.py

Author: tanloong

Lib/sqlite3/_completer.py

@@ -5,7 +5,7 @@
 except ImportError:
     SQLITE_KEYWORDS = ()
 
-CLI_COMMANDS = ('.quit', '.help', '.version')
+CLI_COMMANDS = ('.quit', '.help', '.version', '.tables')
 
 _completion_matches = []