R7RS let(rec)-syntax doesn't allow more than 1 variables

[Takashi Kato]

This raises an error.

(let-syntax ((a (syntax-rules ()))
             (b (syntax-rules ())))
  (display 'ok))

[Takashi Kato]

Moved ellipsis to proper place (Fixes #67)

→ <<cset 864d82e94ac3>>