Support for the Ruby 2.1 series ended on March 31 2017. See here for details.
Gem::StreamUI
Subclass of StreamUI that instantiates the user interaction using STDIN, STDOUT, and STDERR.
The Console UI has no arguments as it defaults to reading input from stdin, output to stdout and warnings or errors to stderr.
# File rubygems/user_interaction.rb, line 659 def initialize super STDIN, STDOUT, STDERR, true end
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