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better default for search

In the following code, I replaced 'word with 'sexp and get
much better results.  It is much more common that I search
for a word-like-this than one word.

Perhaps w3m can either change this to sexp as I have done
below or allow a variable for it.


(defun w3m-search-read-query (prompt prompt-with-default &optional history)
  "Read a query from the minibuffer, prompting with string PROMPT.
When a default value for the query is discovered, prompt with string
PROMPT-WITH-DEFAULT instead of string PROMPT."
  (let ((default
	  (if (w3m-region-active-p)
	      (buffer-substring (region-beginning) (region-end))
	    (unless (and (eq major-mode 'w3m-mode)
			 (listp (get-text-property (point-at-bol) 'face))
			 (memq 'w3m-header-line-location-title
			       (get-text-property (point-at-bol) 'face)))
==>	      (thing-at-point 'sexp))))
    (when default
      (set-text-properties 0 (length default) nil default)
      (when (or w3m-search-word-at-point (w3m-region-active-p))
	(setq initial default
	      default nil))
      (when (w3m-region-active-p)
    (read-string (if default
		     (format prompt-with-default default)
		 initial history default)))

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