force_sort_within_sections with multi-line file docstring causes comments to be duplicated?

[EricCousineau-TRI]

In RobotLocomotion/drake#13709 (review), I noticed that a comment was getting duplicated.

Managed to get a min repro here, using isort==5.1.2:
https://github.com/EricCousineau-TRI/repro/blob/e73591778217dff2937db6eae5155e5574d184c0/bug/isort_bug/code.py

Basically, the following source code:

"""
Multi-line docstring
"""
# Comment for A.
import a
# Comment for B - not A!
import b

gets transformed into this:

"""
Multi-line docstring
"""
# Comment for B - not A!
import a
# Comment for B - not A!
import b

(see the linked code.py for comparison)

[timothycrosley]

Thanks for reporting! This is fixed in the 5.1.3 patch release

[EricCousineau-TRI]

Sweet! Thanks for the speedy response!

(Just an xref: bf47b31)

[EricCousineau-TRI]

BTW I'm guessin' ya may already know, but here're GitHub's "magic words" for auto-closing issues via PRs or commits:
https://docs.github.com/en/github/managing-your-work-on-github/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword

I think this would've been auto-closed if you removed the intermediate "issue", e.g. "Fixed #1328: ..."