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[no subject]

There is nothing magic about readlne. At the time it is invoked it
will read a lne of characters forward until a carriage return and
let you rubot as many characters as you type while yo are in the readlne.
Characters that preceded its invocation cannot be rubbed out.
Characters that are typed after it returns (including rubouts) cannot
affect it since it will have already returned the characters to you as
as string. VALRET'ing strings to DDT is a pretty KLUDGEY way to get 
something done anyway... -kmp