ebrowse.el uses the C-c b as a prefix key...

[Alexandru Harsanyi]

I just noticed today that ebrowse.el uses the C-c b key sequence as a  
prefix key.

The Elisp Reference Manual, section 'D.2 Key Binding Conventions'  
mentions that the sequence C-c followed by a letter is reserved for  
users.  Is the reference manual wrong or ebrowse.el uses a key  
sequence reserved for users?

Best Regards,
Alex.