nullglob is documented incorrectly

[Emanuele Torre]

Today, a user in the #bash IRC channel of libera.chat, misunderstood how
nullglob is supposed to work because is documented incorrectly in the
man page:

    'nullglob'
         If set, Bash allows filename patterns which match no files to
         expand to a null string, rather than themselves.

globs expand to nothing if there are no matches with nullglob set, not
to the null/empty string.

o/
 emanuele6