rails/rails — comment on commit 0f2f8003d2351079ce6ec0e706e474d8024839cc
File:  line 0
By rubys:

This removes a publicly documented API without deprecation:

http://api.rubyonrails.org/classes/ActiveSupport/Base64.html

This API is known to be used by at least one popular gem:

https://github.com/Shopify/active_merchant/blob/master/lib/active_merchant.rb#L33