How to escape control characters?

[kdevel]

On Thursday, 19 September 2024 at 14:30:08 UTC, Gerardo Cahn 
wrote:
> I am using the code listed here.

It should be left to posterity that the code presented in this 
thread cannot properly escape

```
    "A\xfeZ"
```

```
BV's escape: cast(char) 0x41, cast(char) 0xFE, cast(char) 0x5A
steve's: cast(char) 0x41, cast(char) 0xFE, cast(char) 0x5A
```

nor ("and possibly unicode ones too,", cy March 31, 2016)

```
    "A\u00fcZ"
```

```
BV's escape: AüZ
steve's: AüZ
```