It displays the list of builtins at the top, then has all the details for each command below.
bash defines the following built-in commands: :, ., [, alias, bg, bind,
break, builtin, case, cd, command, compgen, complete, continue,
declare, dirs, disown, echo, enable, eval, exec, exit, export, fc, fg,
getopts, hash, help, history, if, jobs, kill, let, local, logout, popd,
printf, pushd, pwd, read, readonly, return, set, shift, shopt, source,
suspend, test, times, trap, type, typeset, ulimit, umask, unalias,
unset, until, wait, while.