> Can you reflect this fact in your patches?

Sure. (Though for stdin '\n' is converted to os.linesep and no more.)

Would you mind if I also updated the following part of the subprocess documentation to reference the part we are updating, so that the documentation is just in one place?

"If universal_newlines is True, the file objects stdout and stderr are opened as text files, but lines may be terminated by any of '\n', the Unix end-of-line convention, '\r', the old Macintosh convention or '\r\n', the Windows convention. All of these external representations are seen as '\n' by the Python program."

The part we're updating is in the "Frequently Used Arguments" section and so seems like the natural place for expanded details.