riywo/fluent-plugin-groupcounter — pull request #10 by sonots (2013-12-27 16:55:18+00:00)
Title: Add `add_tag_prefix` and `remove_tag_prefix` options

To follow [Recommended fluent-plugin's option names (draft)](https://gist.github.com/sonots/8000240). `tag_prefix` and `input_tag_remove_prefix` options are obsolete.