[ruby/fileutils] Add mkdir_p to FileUtils.install (https://github.com/ruby/fileutils/pull/104)
Add mkdir_p to FileUtils.install
Adjust raise message.
adjust raise language
handle trailing slash in dest
simplify
Add tests
[ruby/fileutils] Add mkdir_p to FileUtils.install
(https://github.com/ruby/fileutils/pull/104)
Add mkdir_p to FileUtils.install
Adjust raise message.
adjust raise language
handle trailing slash in dest
simplify
Add tests