Commit [ef3fa4] Maximize Restore History

A more efficient algorithm for remove-duplicates on lists when there

is no :key or :test-not argument and :test is one of the standardly
acceptable arguments for make-hash-table. The previous algorithm
ran in O(n^2) time; this algorithm runs in O(n) time, n the length
of the list.

Paul F. Dietz Paul F. Dietz 2005-07-26

changed src/code/seq.lisp
changed BUGS
changed NEWS
changed version.lisp-expr
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