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(Info-fontify): New variable.
(Info-mode): Initialize Info-related faces.
(Info-select-node): Fontify the node if necessary.

(Info-goto-node): Provide completion for node names.
(Info-read-node-name, Info-build-node-completions): New functions.
(Info-current-file-completions): New variable.
(Info-find-node): Clear completions cache.

(Info-next-reference, Info-prev-reference): New commands.
(Info-mode-map): Bind these to TAB and M-TAB.
(Info-next-preorder): Special case if sitting on "*Note" reference.

(Info-standalone): New variable.
(Info-exit): Exit Emacs if in standalone mode.
(info-standalone): New function.

(Info-summary): Added `bury-buffer' call.
(Info-no-error): Renamed from `no-error'.
(Info-suffix-list): Put ".info" before "" to deal with directory
named "foo" next to file "foo.info".