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

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Removes trailing whitespace from <em>str</em>, returning <tt>nil</tt> if no change was made. See also <tt>String#lstrip!</tt> and <tt>String#strip!</tt>.
- !ruby/struct:SM::Flow::VERB 
  body: "   &quot;  hello  &quot;.rstrip   #=&gt; &quot;  hello&quot;\n   &quot;hello&quot;.rstrip!      #=&gt; nil\n"
full_name: String#rstrip!
is_singleton: false
name: rstrip!
params: |
  str.rstrip!   => self or nil

visibility: public