add some kindness

Author: fxn

CONTRIBUTING.md

@@ -1,8 +1,8 @@
 Ruby on Rails is a volunteer effort. We encourage you to pitch in. [Join the team](http://contributors.rubyonrails.org)!
 
-Read the [Contributing to Ruby on Rails](http://edgeguides.rubyonrails.org/contributing_to_ruby_on_rails.html) guide before submitting any code, it is a comprehensive introduction.
+Please read the [Contributing to Ruby on Rails](http://edgeguides.rubyonrails.org/contributing_to_ruby_on_rails.html) guide before submitting any code.
 
-Please note that *we only accept bug reports and pull requests in GitHub*.
+*We only accept bug reports and pull requests in GitHub*.
 
 If you have a question about how to use Ruby on Rails, please [ask the rubyonrails-talk mailing list](https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-talk).