From the description of the "~F" directive for 'format'
<http://www.lispworks.com/reference/HyperSpec/Body/22_cca.htm>:
If both w and d are omitted, then the effect is to print the
value using ordinary free-format output; prin1 uses this
format for any number whose magnitude is either zero or
between 10^-3 (inclusive) and 10^7 (exclusive).
Is there any way to force that a floating point number be printed
without exponential representation without have to specify the width
of the number of decimal points to be used in the representation?