Snd 22.8
A bit early, but I want to try something that doesn't fit at
the end of the cycle.
s7: s7_number_to_real_with_location. s7_wrong_type_error.
s7_make_string_wrapper_with_length. s7_make_semipermanent_string.
CL-style doc strings, (symbol...) settable.
checked: sbcl 2.2.9