glob(7) man page is confusing

[Gianfranco Berardi <linuxmail@gbgames.com>]

In the glob(7) man page, you find the following:

>Ranges
>There is one special convention: two characters separated by `-' 
denote >a range.  (Thus, `[A-Fa-f0-9]' is
>equivalent to `[ABCDEFabcdef0123456789]'.)  One may include `-' in its 
>literal meaning by making  it  the
>first or last character between the brackets.  (Thus, `[]-]' >matches 
just the two characters `]' and `-',
>and `[--/]' matches the three characters `-', `.', `/'.)

However, when you run the following command:

$ ls myfile[--/]txt


it will say

ls: myfile[--/]txt:No such file or directory

However,

$ ls myfile [-.]txt

returns myfile.txt and myfile-txt if they exist.

Since file names can't have a '/' in them, is the man page just written 
strangely/incorrectly or am I just not using this the way it was meant 
to be used?
I tried to see if other people had issues with this but Google didn't 
return anything but HTML versions of man pages or information on how 
glob was a security risk on ftp servers.

Thanks,
Gianfranco