Impossible to prevent Ink from collapsing whitespace?

Sorry for double posting this discussion #666 (heh, interesting), but the discussions don't seem to be very active.

I have a fictional terminal-like setup and I want to do ASCII drawings (and other fixed width formatted text) like these:
```
┌─────────────────┐
│ │
│ │
├──────────┐ │
│ │ │
│ │ │
│ │ │
└──────────┴──────┘
```

But when I get the text from the Ink api the whitespaces are collapsed and I get:

```
┌─────────────────┐
│ │
│ │
├──────────┐ │
│ │ │
│ │ │
│ │ │
└──────────┴──────┘
```

Using a special character to stand in for a space and replace that afterwards could work, but is quite cumbersome and error-prone. I can't do a custom tag or other bespoke postprocessing because, by the time I can process the string, the whitespaces are already collapsed.

I guess I'm looking an option or special syntax that would prevent Ink from collapsing whitespace. Does that exist?