mail

https://github.com/mikel/mail

Ruby

A Really Ruby Mail Library

Mail::Field#initialize

Accepts a string:

 Field.new("field-name: field data")

Or name, value pair:

 Field.new("field-name", "value")

Or a name by itself:

 Field.new("field-name")

Note, does not want a terminating carriage return.  Returns
self appropriately parsed.  If value is not a string, then
it will be passed through as is, for example, content-type
field can accept an array with the type and a hash of
parameters:

 Field.new('content-type', ['text', 'plain', {:charset => 'UTF-8'}])

Source | Google | Stack overflow

Edit

git clone [email protected]:mikel/mail.git
cd mail
open lib/mail/field.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Mail--Field-initialize-for-pr

# Commit to git

git add lib/mail/field.rbgit commit -m "better docs for Mail::Field#initialize"

# 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--Field-initialize-for-pr

hub pull-request

# Celebrate!