Ive written my own read and write versions now, no biggie.
file_str_writeto now works but keeps terminating the buffer-read early
even though I specify "" as delimiter (ie no delimiter).
Dunno if its actually a bug or not, cause I didnt test it very thoroughly.

It is interesting that Bunsens 2 lines allows compile and execution,
but JCL's one liner doesnt...

Anyone know why? Just curious, as Ive written new code now.
Its not a time-critical area so in-efficient code is not important...