Problem/bug in nmap documentation?

I've discovered what I think is a mis-identification of a service 
(latest nmap, Linux platform). Nmap does identify a lower-level 
component used for the service, but not the actual service. (This is not 
the bug; it's where I started.)

I've searched around, but not found any other recommendation for 
submitting corrections/additions than that on the 'Community 
contributions' page (https://nmap.org/book/vscan-community.html), where 
it says

"Run the command nmap -O -Pn -sSV -T4 -d --version-trace -p<port> 
<target>, where <port> is the port running the misidentified service on 
the <target> host."

followed by a pointer to the standard submit page.

However, that command does _not_ produce a service version fingerprint, 
so there's nothing to submit.  (I can only assume it worked at one time, 
but since has changed no non-working state.)  It does provide a os 
fingerprint, but that's

That's the bug: the command does not work as stated.

Next ... how do I produce the necessary service fingerprint for 
submission?

regards,
-- 
/A. Thulin
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