[perl #125099] Macros that return a string can't be invoked

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# New Ticket Created by  Rob Hoelz 
# Please include the string:  [perl #125099]
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Following this example:

    macro f() {
        '1 + 1'
    }
    say f();

from http://design.perl6.org/S06.html#line_3160 results in the following 
compiler error:

    Too few positionals passed; expected 3 arguments but got 2