Trailing whitespace in triple double quotes does not get cut

[tweakimp]

Operating system: Windows 10 x64
Python version: 3.6.5
Black version: 18.6b1
Does also happen on master: ✔️

Black does not change anything in this:

"""
This string has 
trailing whitespace 
in every but the last line.
"""

Is it supposed to be that way?

[ambv]

Thanks for your interest in Black! 💯

As for your question: yes, all contents in a multiline strings is data. It would be invalid for Black to modify it because your application may depend on it being exactly as is.