Great customer service!
I just used Vim’s listchars feature for the first time to make
non-breaking spaces visible. Only I found that it did not appear to
work correctly; the nbsp item in listchars only worked if I also
included trail, on the other hand, including eol would not change
the behavior.
Before reporting bugs, one should always try the latest release, and so I did. I was not inconsiderably surprised that the bug was indeed fixed there.
Then I looked at the repo, and found that it had been fixed not 24 hours before I hit it when using the entire feature for the first time.