[rb] allow users to access the full script of the atom directly

This will make it easier to pin an atom if desired

rb/lib/selenium/webdriver/atoms.rb

@@ -20,16 +20,19 @@
 module Selenium
   module WebDriver
     module Atoms
+      def atom_script(function_name)
+        format("/* #{function_name} */return (%<atom>s).apply(null, arguments)",
+               atom: read_atom(function_name))
+      end
+
       private
 
       def read_atom(function)
         File.read(File.expand_path("../atoms/#{function}.js", __FILE__))
       end
 
       def execute_atom(function_name, *arguments)
-        script = format("/* #{function_name} */return (%<atom>s).apply(null, arguments)",
-                        atom: read_atom(function_name))
-        execute_script(script, *arguments)
+        execute_script(atom_script(function_name), *arguments)
       end
     end # Atoms
   end # WebDriver