(apropos-match-face): Doc fix.

(apropos-match-face): Doc fix.
(apropos-sort-by-scores): Add new choice `verbose'.
(apropos-documentation-sort-by-scores): New defcustom.
(apropos-pattern): Now contains the pattern entered by the user.
(apropos-pattern-quoted): New defvar.
(apropos-regexp): New defvar, containing the regexp corresponding
to apropos-pattern.
(apropos-all-words-regexp): Renamed from apropos-all-regexp.
(apropos-read-pattern): New defun.  Use it to read pattern arg in
interactive calls; returns list of words for a word list, and
string for a regexp.
(apropos-parse-pattern): Renamed from apropos-rewrite-regexp.  Now
parses a list of words or regexp as returned by apropos-read-pattern.
(apropos-calc-scores): Return nil if apropos-regexp doesn't match.
(apropos-score-doc): Return a very high score if the string
entered by the user matches literally.
(apropos-variable): Doc fix.  Use apropos-read-pattern.
(apropos-command): Doc fix.  Use apropos-read-pattern and
apropos-parse-pattern.  Call apropos-print with nosubst=t.
(apropos, apropos-value): Doc fix. Use apropos-read-pattern and
apropos-parse-pattern.
(apropos-documentation): Doc fix. Use apropos-read-pattern and
apropos-parse-pattern.  Locally bind apropos-sort-by-scores to
apropos-documentation-sort-by-scores.  Call apropos-print with
nosubst=t.
(apropos-documentation-internal): Pass doc string through
substitute-key-definition before adding text properties.
Highlight substring matching literal user input if possible.
(apropos-documentation-check-doc-file): Remove locals beg and end.
Fix calculation of score (as added twice).  Pass doc string through
substitute-key-definition before adding text properties.
(apropos-documentation-check-elc-file): Pass doc string through
substitute-key-definition before adding text properties.
Highlight substring matching literal user input if possible.
(apropos-print): Add new arg NOSUBST; if set, command and variable
doc strings have already been passed through substitute-key-definition.
Add code to handle apropos-accumulator items without score element
for backwards compatibility (e.g. with woman package).
Only show scores if apropos-sort-by-scores is `verbose'.