carrierwave

https://github.com/carrierwaveuploader/carrierwave

Ruby

Classier solution for file uploads for Rails, Sinatra and other Ruby web frameworks

Mail::PartsList#encode_with

The #encode_with and #to_yaml methods are just implemented
for the sake of backward compatibility ; the delegator does
not correctly delegate these calls to the delegated object

Source | Google | Stack overflow

Edit

git clone [email protected]:carrierwaveuploader/carrierwave.git

cd carrierwave

open

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Mail--PartsList-encode_with-for-pr

# Commit to git

git add git commit -m "better docs for Mail::PartsList#encode_with"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Mail--PartsList-encode_with-for-pr

hub pull-request

# Celebrate!