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  1. !! +exec+ +var+ +string+
  2. tit:declosing
  3. type:$type_both
  4. syntax:!declosing ``string''
  5. mean:Strips off enclosing pair of parentheses ((),[],{}) in ``string''. \
  6.   Useful for treatment of user-input vectors or sets, \
  7.   where some users use enclosing parentheses and other do not.
  8.