Use Regex to search for author

script/check_contributors_md.rb

@@ -29,7 +29,10 @@ Please set it using
   end
 end
 
-unless File.read('CONTRIBUTORS.md').include? author
+# Escape chars in name, and make case insensitive
+author_to_search_for = Regexp.new(Regexp.escape(author), Regexp::IGNORECASE)
+
+unless File.read('CONTRIBUTORS.md').match?(author_to_search_for)
   abort %(
 Thanks for your contribution, #{author}!
 Please add your name and GitHub handle to the file CONTRIBUTORS.md,