Apropos the built-in types section, would it make sense to replace a slightly ambiguous sentence mixing three things:
"On most systems, the :float type represents a C float and a Lisp single-float. :double represents a C double and a Lisp double-float."
with two separate sentences:
"On all systems the :float type represents a C float, :double represents a C double."
and
"On most systems, the :float type a Lisp single-float, :double represents a Lisp double-float."
?
respectfully, Samium Gromoff