Signals that a file permission error is preventing the user from operating on the given directory.
Mixin module providing HTML generation methods.
For example,
cgi.a("http://www.example.com") { "Example" } # => "<A HREF=\"http://www.example.com\">Example</A>"
Modules Html3, Html4, etc., contain more basic HTML-generation methods (#title, #h1, etc.).
See class CGI for a detailed example.
Configuration options for dumping YAML.
An InstalledSpecification represents a gem that is already installed locally.
This exception is raised if the required unicode support is missing on the system. Usually this means that the iconv library is not installed.
Exception raised when there is an invalid encoding detected
Hash with completion search feature. See OptionParser::Completion.