Rails core - Mar 2014 - Allow hash for conditional class attribute in tag helper

When dealing with conditional class attribute values in HTML tags, I often 
find myself writing code like:

  link_to(post.title, post, class: "post #{post.active? ?
"active" : ""}")

The code would be much cleaner if we allowed a hash syntax:

  link_to(post.title, post, class: {"post" => true,
"active" =>
post.active?})

The implementation is straightforward:

 
https://github.com/sos4nt/rails/commit/a9ed04f75ce9db46af6cbdefa64dfb09fb3eb73a

What do you think?

-Stefan

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