This also removes Pry.

Separate the UrlGenerator out from the Attachment. Some example plugins that could be written include generating thumbnails on the fly for different thumbnail sizes, or delaying the thumbnail generation until it is first called.

Fix a bug when passing a method name to `:if` and `:unless` option in `validates_attachment_presence`

Fixes #631

ones (:private and :public_read) in the s3_test
completed test for lambda permission value

formulate assert conditions

bit of work

Paperclip::InterpolatedString will ensure that we're not double escape the string, which was the cause of the escaped filename problem in #path method.

Saving instances causes memory leaks in development mode in rails.

It's Paperclip's responsibility to escape special characters from the URL to make sure that it's comply with standard.

Closes #577, Closes #563, and reverse my judgement on #482.

It was working fine for me locally