S3Path.iterdir() gives wrong paths when used with trailing slash

Which operating system and Python version are you using? Windows 11, Python 3.9.6

Which version of this project are you using? 0.1.3

What did you do?

Created an S3 bucket with a "folder" containing 3 text files.
Created an S3 path object using path of the folder, with trailing slash.
Listed folder contents using iterdir() method.

What did you expect to see? Correct paths of each of the files

What did you see instead? Extra slash in the paths. I get the expected result:

if I don't have a trailing slash
if I get the filesystem object and use its ls() method.

>>> # scenario 1
>>> spath = UPath('s3://tj.test.bucket/firstsubfolder/')  # note trailing slash
>>> for f in spath.iterdir():
...     print(f)
...
s3://tj.test.bucket/firstsubfolder//
s3://tj.test.bucket/firstsubfolder//file_1.txt
s3://tj.test.bucket/firstsubfolder//file_2.txt
s3://tj.test.bucket/firstsubfolder//file_3.txt
>>>
>>> # scenario 2 - same spath but using filesystem.ls
>>> for f in spath.fs.ls(str(spath)):
...     print(f)
...
tj.test.bucket/firstsubfolder/
tj.test.bucket/firstsubfolder/file_1.txt
tj.test.bucket/firstsubfolder/file_2.txt
tj.test.bucket/firstsubfolder/file_3.txt
>>>
>>> # scenario 3 - no trailing slash
>>> spath = UPath('s3://tj.test.bucket/firstsubfolder')  # note NO trailing slash
>>> for f in spath.iterdir():
...     print(f)
...
s3://tj.test.bucket/firstsubfolder/
s3://tj.test.bucket/firstsubfolder/file_1.txt
s3://tj.test.bucket/firstsubfolder/file_2.txt
s3://tj.test.bucket/firstsubfolder/file_3.txt

fsspec / universal_pathlib

S3Path.iterdir() gives wrong paths when used with trailing slash #146