Shugo Maeda

Write characters one by one to display full-width characters correctly

10

Otherwise, full-width characters overlap on a [new Windows console](https://docs.microsoft.com/en-us/previous-versions/orphan-topics/ws.11/mt427362(v=ws.11)). 

Fixes #80

Currently, argument types of `def foo(...)` is `(*untyped)`, but it will be changed to `(*untyped, **untyped **)` if ruby/ruby#6818 is merged. The current behavior depends on the implementation details of...

Clarify the license of net-imap

8

https://github.com/ruby/resolv/issues/45 realized me that LICENSE.txt contains only BSD-2-Clause license, while gemspec specifies both Ruby's and BSD-2-Clause license. So I'd like to clarify the license.

Clarify the license of net-ftp

4

https://github.com/ruby/resolv/issues/45 realized me that LICENSE.txt contains only BSD-2-Clause license, while gemspec specifies both Ruby's and BSD-2-Clause license. So I'd like to clarify the license.

Use String#byteindex instead of String#index

6

Because String#index takes O(N), where N is the second argument, while String#byteindex takes O(1).