Templates have one format

Templates only have one format.  Before this commit, templates would be
constructed with a single element array that contained the format.  This
commit eliminates the single element array and just implements a
`format` method.  This saves one array allocation per template.

2 files changed, 2 insertions, 2 deletions

diff --git a/actionview/lib/action_view/renderer/abstract_renderer.rb b/actionview/lib/action_view/renderer/abstract_renderer.rb
index f1b4c9b92d..475452f1bb 100644
--- a/actionview/lib/action_view/renderer/abstract_renderer.rb
+++ b/actionview/lib/action_view/renderer/abstract_renderer.rb
@@ -68,7 +68,7 @@ module ActionView
       end
 
       def format
-        template.formats.first
+        template.format
       end
 
       EMPTY_SPACER = Struct.new(:body).new
diff --git a/actionview/lib/action_view/renderer/template_renderer.rb b/actionview/lib/action_view/renderer/template_renderer.rb
index 87f6cf3de3..83b990b081 100644
--- a/actionview/lib/action_view/renderer/template_renderer.rb
+++ b/actionview/lib/action_view/renderer/template_renderer.rb
@@ -8,7 +8,7 @@ module ActionView
       @details = extract_details(options)
       template = determine_template(options)
 
-      prepend_formats(template.formats)
+      prepend_formats(template.format)
 
       render_template(context, template, options[:layout], options[:locals] || {})
     end