(isearch-mode-map, isearch-other-meta-char, isearch-quote-char,

(isearch-mode-map, isearch-other-meta-char, isearch-quote-char,
isearch-printing-char, isearch-text-char-description): "?\ " -> "?\s".
(isearch-lazy-highlight-cleanup, isearch-lazy-highlight-initial-delay,
isearch-lazy-highlight-interval, isearch-lazy-highlight-max-at-a-time,
isearch-lazy-highlight-face, isearch-lazy-highlight-cleanup): Declare with
define-obsolete-*-alias macros.
(isearch-forward): Fix typo in docstring.
(search-invisible, search-ring-yank-pointer, regexp-search-ring-yank-pointer):
Doc fixes.