better comment describing INDEX type
authorChristophe Rhodes <csr21@cantab.net>
Mon, 9 Sep 2013 09:21:54 +0000 (10:21 +0100)
committerChristophe Rhodes <csr21@cantab.net>
Mon, 9 Sep 2013 09:21:54 +0000 (10:21 +0100)
commitb08c57465f30c0d1632a5ad47a247453698c3bcc
tree7a726eede5c20aa66644a58e8a3a48aac3ff05c2
parentc07b621a73f9580a32d27d94e301c01c5dad5f4e
better comment describing INDEX type

merged ideas from Paul Khuong and Jan Moringen, from
<http://paste.lisp.org/display/138734>
src/code/early-extensions.lisp