Clean up plugin READMEs and a few plugins

- fasd
- history
- mercurial
- pylint
- repo
- yii2

plugins/rails/README.md

@@ -80,4 +80,3 @@ separately. For example: `REP rake db:migrate` will migrate the production db.
 | `ssp`   | `ruby script/spec`                 |
 | `sc`    | `ruby script/console`              |
 | `sd`    | `ruby script/server --debugger`    |
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