FAQ.rst:Replace a FAQ

Replace a FAQ about pull requests with how to contribute to coala.

closes: #552

Author: sarthakchakerverty

Help/FAQ.rst

@@ -117,7 +117,7 @@ Need help contributing to coala?
 --------------------------------
 
 If you're new to coala or need any help contributing to coala,please
-checkout the 'coala API documentation <http://api.coala.io/en/latest/>`_.
+checkout the `coala API documentation <http://api.coala.io/en/latest/>`_.
 
 What is coala Community Code of Conduct?
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