CLHS: Section 22.3.4.2

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## 22.3.4.2 Tilde S: Standard

This is just like `~A`, but arg is printed with escape characters (as by prin1 rather than `princ`). The output is therefore suitable for input to read. `~S` accepts all the arguments and modifiers that `~A` does.

`~S` binds *print-escape* to t.

The following X3J13 cleanup issue, not part of the specification, applies to this section:

- FORMAT-PRETTY-PRINT:YES

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