message: re-implementation of VMD's exwithin without using wihtin
diff: @@ -43,9 +43,7 @@ export const operators: OperatorList = [
  rule: h.prefixOp(/EXWITHIN\s+([-+]?[0-9]*\.?[0-9]+)\s+OF/i, 1).map((x: any) => parseFloat(x)),
  map: (radius: number, target: Expression) => {
  return B.struct.modifier.exceptBy({
  - '0': B.struct.filter.within({
  - '0': B.struct.generator.atomGroups(), target, 'max-radius': radius
  - }),
  + '0': B.struct.modifier.includeSurroundings({ 0: target, radius }),
  by: target
  });
  }
  @@ -58,7 +56,7 @@ export const operators: OperatorList = [
  rule: h.prefixOp(new RegExp(`SAME\\s+(${propNames})\\s+AS`, 'i'), 1).map((x: any) => properties[x].property),
  map: (property: Expression, source: Expression) => {
  return B.struct.filter.withSameAtomProperties({
  - '0': B.struct.generator.atomGroups(),
  + '0': B.struct.generator.all(),
  source,
  property
  });
  