Fix template path parsing for rails versions that don't expose format symbols

Author: Sam Phippen

lib/rspec/rails/example/view_example_group.rb

@@ -129,14 +129,20 @@ def rendered.body
 
         def _default_render_options
           if ::Rails::VERSION::STRING >= '3.2'
+            formats = if ActionView::Template::Types.respond_to?(:symbols)
+              ActionView::Template::Types.symbols.map { |x| Regexp.escape(x) }.join("|")
+            else
+              [:html, :text, :js, :css, :xml, :json].map(&:to_s)
+            end.map { |x| Regexp.escape(x) }.join("|")
+
+
             handlers = ActionView::Template::Handlers.extensions.map { |x| Regexp.escape(x) }.join("|")
-            formats = ActionView::Template::Types.symbols.map { |x| Regexp.escape(x) }.join("|")
             locales = "[a-z]{2}(?:-[A-Z]{2})?"
             variants = "[^.]*"
             path_regex = %r{
-              \A
-              (?<template>.*?)
-              (?:\.(?<locale>#{locales}))??
+            \A
+            (?<template>.*?)
+            (?:\.(?<locale>#{locales}))??
               (?:\.(?<format>#{formats}))??
               (?:\+(?<variant>#{variants}))??
               (?:\.(?<handler>#{handlers}))?