Hello,

I apologize if this is expected behavior, however it doesn't appear to be documented.

>>> "single\x1eline\x1estring".splitlines()
['single', 'line', 'string']

The glossary refers to the universal newlines as:


> universal newlines
>    A manner of interpreting text streams in which all of the 
>    following are recognized as ending a line: the Unix end-of-line
>    convention '\n', the Windows convention '\r\n', and the old 
>    Macintosh convention '\r'. See PEP 278 and PEP 3116, as well as 
>    bytes.splitlines() for an additional use.
https://docs.python.org/3/glossary.html#term-universal-newlines

According to Wikipedia, pre-POSIX QNX uses `\x1e` as a newline (https://en.wikipedia.org/wiki/Newline#Representation), but I don't think that it should be treated as the default.