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    @strings = (
      'x',
    ...
    /*x*/ => '*x*/'
    
    "x" => '"x"'
    
  2. or download this
    (?x-ims:               # group, but do not capture (disregarding
                           # whitespace and comments) (case-sensitive)
    ...
      )                      # end of \1
    
    )                      # end of grouping