(Checked against bash 4.2; for some reason, the manual on gnu.org is only 4.1.)
The top node, "Bash Features", says: "The following menu breaks the features up into categories based upon which one of these other shells inspired the feature." But the following menu doesn't seem to bear that out. Perhaps it's simplest just to remove this sentence, as the top-level menu is perfectly logical and self-explanatory. -- http://rrt.sc3d.org