Flowdock
chop() public

Equivalent to ($_.dup).chop!, except nil is never returned. See String#chop!.

   a  =  "now\r\n"
   $_ = a
   chop   #=> "now"
   $_     #=> "now"
   chop   #=> "no"
   chop   #=> "n"
   chop   #=> ""
   chop   #=> ""
   a      #=> "now\r\n"
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