devise

https://github.com/plataformatec/devise

Ruby

Flexible authentication solution for Rails with Warden.

Mail::Message#header

Returns the header object of the message object. Or, if passed
a parameter sets the value.

Example:

 mail = Mail::Message.new('To: mikel\r\nFrom: you')
 mail.header #=> #<Mail::Header:0x13ce14 @raw_source="To: mikel\r\nFr...

 mail.header #=> nil
 mail.header 'To: mikel\r\nFrom: you'
 mail.header #=> #<Mail::Header:0x13ce14 @raw_source="To: mikel\r\nFr...

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-header-for-pr

# Commit to git

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

# 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-header-for-pr

hub pull-request

# Celebrate!