[Tiny] Indent is revised.
LIST/DET% is improved to omit unreachable edges of code.
[Bugfix] Symbol LEAF must be exported.
[Bugfix] STR-CASE accepts multiple body forms for each clause.

STR-CASE should follow CASE macro, and CASE macro can take multiple body
forms for each clause.

In addition, list form keys shown as below is made acceptable. This is
also supported in CASE macro.

    (("Common Lisp" "CL") (print "Lispy))

STR-CASE is dear old macro. It was written at the very first part of
APTCC project.