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4ee1f0fb5d
(https://github.com/ruby/irb/pull/761) * Implement `history` command Lists IRB input history with indices. Also aliased as `hist`. * Add tests for `history` command * Address feedback: `puts` with multiple arguments instead of `join`ing * Address feedback: Handle nil from splitting an empty input string * Refactor line truncation * Add `-g` grep option to `history` command * Add `history` command to README * Remove unused `*args` parameter * Allow spaces to be included in grep * Allow `/` to be included in grep regex * Handle `input` being an empty string * Exclude "#{index}: " from matching the grep regex * Add new line after joining https://github.com/ruby/irb/commit/3f9eacbfa9