(blocking-do-multiple): Fixed typo in docstring.

src/macros.el

@@ -163,7 +163,7 @@ Value returned is always nil."
 The value of the last form in BODY is returned.
 Each element in BIND-LIST is a list (SYMBOL FORM) which binds SYMBOL to
 the result of the server call FORM, which is the same as used in blocking-do.
-All the forms in BIND-LIST are evaluated before and symbols are bound."
+All the forms in BIND-LIST are evaluated before any symbols are bound."
   (let ((bindsym 'multiple-bind-sym)
 	(index 0))
     (` (let (((, bindsym)