use of CR character

When I do:
```
| meta |
	meta := MicMetaDataBlock new.
	meta body: Dictionary new.
	meta
		atKey: 'test' put: 'something'.

ref := FileLocator documents / 'test' / 'test.txt'.
ref ensureCreateFile.
(MicTextualMicrodownExporter new visit: meta) contents
```
The return character is CR, who is not used by windows or mac, or linux