--- !ruby/object:RDoc::RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:RDoc::Markup::Flow::P 
  :body: Translates <em>str</em> in place, using the same rules as <tt>String#tr</tt>. Returns <em>str</em>, or <tt>nil</tt> if no changes were made.
full_name: String#tr!
is_singleton: false
name: tr!
params: |
  str.tr!(from_str, to_str)   => str or nil

visibility: public
