* isearch.el (isearch-search-string): Doc fix.

* isearch.el (isearch-search-string): Doc fix.
  (search-exit-option, search-slow-window-lines, search-slow-speed)
  (search-upper-case, search-nonincremental-instead)
  (search-whitespace-regexp, search-ring-max, regexp-search-ring-max)
  (search-ring-update, search-highlight, isearch-lazy-highlight)
  (lazy-highlight-cleanup, lazy-highlight-initial-delay)
  (lazy-highlight-interval): Remove * from defcustom docstrings.
  (isearch-resume-in-command-history, lazy-highlight-max-at-a-time):
  Remove * from defcustom docstrings; fix typos.
  (isearch-push-state-function, isearch-help-for-help-internal)
  (isearch-help-for-help, isearch-describe-bindings)
  (isearch-describe-mode, minibuffer-local-isearch-map, isearch-mode)
  (isearch-pop-fun-state, isearch-search-fun-function)
  (isearch-lazy-highlight-search): Fix typos in docstrings.
  (isearch-yank-internal, isearch-fallback): Reflow docstrings.
  (isearch-forward): Fix typo and reflow docstring.
  (isearch-help-map): Remove unused `i' binding.  Fix typos in docstring.
  (isearch-mode-map): Don't use `let*'.