Clean up plugin READMEs and a few plugins

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

plugins/github/README.md

@@ -1,4 +1,4 @@
-#  github
+# github plugin
 
 This plugin supports working with GitHub from the command line. It provides a few things:
 
@@ -6,7 +6,7 @@ This plugin supports working with GitHub from the command line. It provides a fe
 * Completion for the `github` Ruby gem.
 * Convenience functions for working with repos and URLs.
 
-###  Functions
+### Functions
 
 * `empty_gh` - Creates a new empty repo (with a `README.md`) and pushes it to GitHub
 * `new_gh` - Initializes an existing directory as a repo and pushes it to GitHub
@@ -14,13 +14,13 @@ This plugin supports working with GitHub from the command line. It provides a fe
 * `git.io` - Shortens a URL using [git.io](https://git.io)
 
 
-##  Installation
+## Installation
 
 [Hub](https://github.com/github/hub) needs to be installed if you want to use it. On OS X with Homebrew, this can be done with `brew install hub`. The `hub` completion definition needs to be added to your `$FPATH` before initializing OMZ.
 
 The [`github` Ruby gem](https://github.com/defunkt/github-gem) needs to be installed if you want to use it.
 
-###  Configuration
+### Configuration
 
 These settings affect `github`'s behavior.
 
@@ -35,7 +35,7 @@ These settings affect `github`'s behavior.
 
 See `man hub` for more details.
 
-###  Homebrew installation note
+### Homebrew installation note
 
 If you have installed `hub` using Homebrew, its completions may not be on your `$FPATH` if you are using the system `zsh`. Homebrew installs `zsh` completion definitions to `/usr/local/share/zsh/site-functions`, which will be on `$FPATH` for the Homebrew-installed `zsh`, but not for the system `zsh`. If you want it to work with the system `zsh`, add this to your `~/.zshrc` before it sources `oh-my-zsh.sh`.