Get it!

Thank you, Asumu.

Btw, crossing post is my fault, not yours.

在 2016年3月1日,上午7:30,Asumu Takikawa <as...@ccs.neu.edu> 写道:

On 2016-02-29 17:24:26 +0800, simmone wrote:
When I use at-exp to build my test data, I found it’ll eat prefix space, it’s a bug?

This behavior is intentional, but if you really need to preserve the spacing
you can use @|| to explicitly tell the @-exp reader to keep spaces.

(see very bottom of http://docs.racket-lang.org/scribble/reader.html)

e.g., for your example:

(define expected @S{
@||  @||
@||  @||
@||  s@||
@||  @||
})

Cheers,
Asumu

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