0.7.3.16:

0.7.3.16:
	(These changes might leave SET-SYNTAX-FROM-CHAR messed up. I'll
		try to fix that soon, or else add some tests to verify
		that it isn't too messed up.)
	ANSIfying FROB-MACRO-CHARACTER functions...
	...made GET-MACRO-CHARACTER return NIL for non-macro characters
	...made SET-MACRO-CHARACTER handle NIL values
	...used %COERCE-CALLABLE-TO-FUN instead of COERCE ... 'FUNCTION
	Some of the "Unconstituentize some of them" operations in
		!COLD-INIT-STANDARD-READTABLE seem to've become no-ops,
		so delete them.
	It seems strange that ASCII RUBOUT should be treated as
		whitespace, so that e.g. "(+ 1\7f2)" EVALs to 3. So
		I deleted the customization of its entry in
		*STANDARD-READTABLE*, and now it's treated as just
		another character, which seems less surprising.