git-auto-fetch: small README fixes

plugins/git-auto-fetch/README.md

-# Git auto fetch
+# Git auto-fetch
 
 Automatically fetches all changes from all remotes while you are working in git-initialized directory.
 
-####Usage
-Add ```git-auto-fetch``` to the plugins array in your zshrc file:
+#### Usage
+
+Add `git-auto-fetch` to the plugins array in your zshrc file:
+
 ```shell
 plugins=(... git-auto-fetch)
 ```
@@ -14,10 +16,10 @@ You can change fetch interval in your .zshrc:
 ```
 GIT_AUTO_FETCH_INTERVAL=1200 #in seconds
 ```
-Log of ```git fetch --all``` will be saved into .git/FETCH_LOG
+Log of `git fetch --all` will be saved into `.git/FETCH_LOG`
 
 
-####Toggle auto fetch per folder
+#### Toggle auto fetch per folder
 If you are using mobile connection or for any other reason you can disable git-auto-fetch for any folder:
 
 ```shell