Clean up plugin READMEs and a few plugins

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

plugins/cpanm/README.md

@@ -1,9 +1,9 @@
 # Cpanm
 
 This plugin provides completion for [Cpanm](https://github.com/miyagawa/cpanminus) ([docs](https://metacpan.org/pod/App::cpanminus)).
- 
+
 To use it add cpanm to the plugins array in your zshrc file.
- 
- ```bash
+
+```zsh
 plugins=(... cpanm)
 ```