Limiting string allocations in skipped example notifications.

Author: pat

lib/rspec/core/notifications.rb

@@ -232,9 +232,14 @@ class SkippedExampleNotification < ExampleNotification
       #   RSpec's built-in formatters emit.
       def fully_formatted(pending_number, colorizer=::RSpec::Core::Formatters::ConsoleCodes)
         formatted_caller = RSpec.configuration.backtrace_formatter.backtrace_line(example.location)
-        colorizer.wrap("\n  #{pending_number}) #{example.full_description}", :pending) + "\n     " +
-          Formatters::ExceptionPresenter::PENDING_DETAIL_FORMATTER.call(example, colorizer) +
-          "\n" + colorizer.wrap("     # #{formatted_caller}\n", :detail)
+
+        [
+          colorizer.wrap("\n  #{pending_number}) #{example.full_description}", :pending),
+          "\n     ",
+          Formatters::ExceptionPresenter::PENDING_DETAIL_FORMATTER.call(example, colorizer),
+          "\n",
+          colorizer.wrap("     # #{formatted_caller}\n", :detail)
+        ].join("")
       end
     end