hidden_method (Mocha::ClassMethod)

        # File lib/mocha/class_method.rb, line 58
    58:     def hidden_method
    59:       if RUBY_VERSION < '1.9'
    60:         method_name = method.to_s.gsub(/\W/) { |s| "_substituted_character_#{s[0]}_" }
    61:       else
    62:         method_name = method.to_s.gsub(/\W/) { |s| "_substituted_character_#{s.ord}_" }
    63:       end
    64:       hidden_method = "__stubba__#{method_name}__stubba__"
    65:       RUBY_VERSION < '1.9' ? hidden_method.to_s : hidden_method.to_sym
    66:     end