(7.0.3) writing a large(?) string to stdout is mangled

I've run into an issue with pharo 7.0.3 where writing a string that
contains embedded crs or lfs to stdout causes the output to be corrupted
in odd ways. I have provided the details and a reproducible test case up
on github[1].

Stef suggested I post the issue here as well ...

Dale

[1] https://github.com/pharo-project/pharo/issues/4266