Introduce Any.quickmap(&block)
Introduce Any.quickmap(&block)

This is a 30%+ faster alternative to Any.map.  But it can only be used
- if the block takes 1 parameter
- if the block *always* returns 1 value that isn't a Slip
- if the block does not contain "last", "next", "redo"
- if the block does not contain any phasers

Examples:
  self.match(:g, :$x, $pat).quickmap: *.Str  # converting matches to strings
  self.quickmap(*.perl).join(', ')           # creating a .perl presentation

I'm not too happy with the name.  Considered "rawmap" and "translate"
or possibly "xlate".  The latter two maybe more adequately describe
the limits of this method as opposed to 'map'.

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