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To this:
- Mime::Type[:HTML]
+ Mime[:html]
This change is so that Rails will not manage a list of constants, and fixes
an issue where if a type isn't registered you could possibly get the wrong
object.
+ `Mime[:html]` is available in older versions of Rails, too, so you can
+ safely change libraries and plugins and maintain compatibility with
+ multiple versions of Rails.
+
* `url_for` does not modify its arguments when generating polymorphic URLs.
*Bernerd Schaefer*