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downcase%21-i.yaml
--- !ruby/object:RI::MethodDescription aliases: [] block_params: comment: - !ruby/struct:SM::Flow::P body: Downcases the contents of <em>str</em>, returning <tt>nil</tt> if no changes were made. full_name: String#downcase! is_singleton: false name: downcase! params: | str.downcase! => str or nil visibility: public
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