PEP 822: Dedented Multiline String (d-string)

[methane (Inada Naoki)]

I explained in a previous thread why I think it’s better to strip the newline immediately after the opening quotes but leave newline in the last line.

@methane

s = d"""
one
two
three
"""
assert s == "one\ntwo\nthree\n"

This string looks three lines. And line in POSIX includes terminal newline. (ref)

rstrip or backslash is ugly. But it is rarely used, only for creating ugly multiline string.
Of course this is my subjective opinion.