AfterNoPrint -- top level method applied after not printing

• Usage:

  X#{topLevelMode,AfterNoPrint} = f

• Inputs:
  • f, a function to be applied after not printing a top-level evaluation result r of type X.
• Consequences:

  • The function f will be applied at top level to the result of an evaluation when printing of the result has been suppressed by a semicolon.