[racket] ok what's wrong there 'syntax-rule' evaluating its operand (??)

Hi Thomas

IIUC you get an error with your original syntax-rules version because
syntax-rules (and syntax-case and syntax-parse) is hygienic by default. In
this case think of table-author etc. being renamed inside the macro to
avoid clashing with variables defined in the calling code. Hence the
undefined error in the calling code.

You *want* and expect it to be defined by the macro, but the default
behavior says otherwise, and needs to be explicitly over-ridden.


Dan
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