Describe the bug
select specific tables in some tables using --regex.
There are redundant tables with same prefix name in result.

To Reproduce
Command executed:
mydumper -u root -p * --regex mysql.proc -o .

Expected behavior
just include metadata mysql.proc.metadata mysql.proc-schema.sql

Backup

ls
metadata  mysql.proc.metadata  mysql.proc-schema.sql  
mysql.procs_priv.metadata  mysql.procs_priv-schema.sql  mysql.proc.sql

Environment (please complete the following information):

• OS version: debian buster
• mydumper 0.10.7, built against MySQL 5.7.33-36