[bug #31680] R6RS string literal intraline whitespace removal

[Göran Weinholt]

Follow-up Comment #3, bug #31680 (project guile):

I've used it for multiline strings, like so:

  (define modp-group1-p
    (string->number
     "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1
      29024E088A67CC74020BBEA63B139B22514A08798E3404DD
      EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245
      E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF"
     16))

or like so:

        "My name is Ozymandias, king of kings:n
         Look on my works, ye Mighty, and despair!"

I think any implementation of multiline strings should be prepared to handle
characters from other operating systems. But surely you should not need to
check for U+205F and so on explictly, isn't it enough to see that they belong
to the right char-general-category?

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