* isearch.el (isearch-search-fun-default): Revert a5bdb872

Remove usage of `isearch-lax-whitespace' inside the `iearch-word'
clause of `isearch-search-fun-default'. That lax variable does not
refer to lax-whitespacing.  Related to (bug#21777).
This reverts commit a5bdb872.

* character-fold.el (character-fold-search): Set to nil
Default to nil for now, until someone implements proper
lax-whitespacing with char-fold searching.

lisp/character-fold.el

@@ -24,7 +24,7 @@
 
 
 ;;;###autoload
-(defvar character-fold-search t
+(defvar character-fold-search nil
   "Non-nil if searches should fold similar characters.
 This means some characters will match entire groups of characters.
 For instance, \" will match all variants of double quotes, and

lisp/isearch.el

@@ -2607,12 +2607,11 @@ Can be changed via `isearch-search-fun-function' for special needs."
       ;; Use lax versions to not fail at the end of the word while
       ;; the user adds and removes characters in the search string
       ;; (or when using nonincremental word isearch)
-      (let ((lax (or isearch-lax-whitespace
-                     (not (or isearch-nonincremental
-                              (null (car isearch-cmds))
-                              (eq (length isearch-string)
-                                  (length (isearch--state-string
-                                           (car isearch-cmds)))))))))
+      (let ((lax (not (or isearch-nonincremental
+			  (null (car isearch-cmds))
+			  (eq (length isearch-string)
+			      (length (isearch--state-string
+                                       (car isearch-cmds))))))))
 	(funcall
 	 (if isearch-forward #'re-search-forward #'re-search-backward)
 	 (if (functionp isearch-word)