[Scheme-reports] Why define-library requires a explicit begin form?

[張書瀚 <zrqsmcx@x>]

Here is a example in r7rs-draft-9.pdf:

(define-library (example life)

  (export life)

  (import (except (scheme base) set!)

          (scheme write)

          (example grid))

  (begin

    (define (life-count grid i j)

      ...)

    ...))

why not:

(define-library (example life)

  (export life)

  (import (except (scheme base) set!)

          (scheme write)

          (example grid))

  (define (life-count grid i j)

    ...)

  ...)

The second one (which is more r6rs-alike) looks less verbose, isn't it?

Can anyone please tell me why the first one is preferred, thank you very much!

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