Update CONTRIBUTING.md

Author: AdamMarsden

CONTRIBUTING.md

@@ -1,10 +1,10 @@
-#Contributing
+# Contributing
 This repo is for posting ideas, problems and additions for CSS Cheat Sheet.
 
-If you have and addition for the CSS cheat sheet, please use the label "**Addition to CSSCS**" or fork and create a pull request.
+If you have an addition for the CSS cheat sheet, please use the label "**Addition to CSSCS**" or fork and create a pull request.
 
 If you have an idea or bug to report about the [pretty version of CSS Cheat Sheet](http://adam-marsden.co.uk/css-cheat-sheet) please add the label "**Pretty CSSCS**" to your issue.
 
 All additions to the CSS Cheat Sheet here on GitHub will be reproduced on the [pretty version of CSS Cheat Sheet.](http://adam-marsden.co.uk/css-cheat-sheet)
 
-If your issue doesn't come under these labels go ahead and post it anyway, it all helps to improve CSS Cheat Sheet.
+If your issue doesn't come under these labels go ahead and post it anyway, it all helps to improve CSS Cheat Sheet.