devise

https://github.com/plataformatec/devise

Ruby

Flexible authentication solution for Rails with Warden.

Mail::Message#subject=

Sets the Subject value of the mail object, pass in a string of the field

Example:

 mail.subject = '=?UTF-8?Q?This_is_=E3=81=82_string?='
 mail.subject #=> "This is あ string"

Source | Google | Stack overflow

Edit

git clone [email protected]:plataformatec/devise.git
cd devise
open

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Mail--Message-subject--for-pr

# Commit to git

git add git commit -m "better docs for Mail::Message#subject="

# 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--Message-subject--for-pr

hub pull-request

# Celebrate!