Use 1.8.7 compatible ruby syntax.
Satisfy rubocop.

Offenses:

lib/rspec/core/example.rb:418:11: C: Do not prefix reader method names with get_.
      def get_generated_description
          ^^^^^^^^^^^^^^^^^^^^^^^^^
lib/rspec/core/example.rb:421:131: C: Line is too long. [139/130]
        location_description + " (Got an error when generating description from matcher: #{e.class}: #{e.message} -- #{e.backtrace.first})"
                                                                                                                                  ^^^^^^^^^