+;;;###autoload
+(defun describe-function-or-variable (symbol &optional buffer frame)
+ "Display the full documentation of the function or variable SYMBOL.
+If SYMBOL is a variable and has a buffer-local value in BUFFER or FRAME
+\(default to the current buffer and current frame), it is displayed along
+with the global value."
+ (interactive
+ (let* ((v-or-f (variable-at-point))
+ (found (symbolp v-or-f))
+ (v-or-f (if found v-or-f (function-called-at-point)))
+ (found (or found v-or-f))
+ (enable-recursive-minibuffers t)
+ val)
+ (setq val (completing-read (if found
+ (format
+ "Describe function or variable (default %s): " v-or-f)
+ "Describe function or variable: ")
+ obarray
+ (lambda (vv)
+ (or (fboundp vv)
+ (get vv 'variable-documentation)
+ (and (boundp vv) (not (keywordp vv)))))
+ t nil nil
+ (if found (symbol-name v-or-f))))
+ (list (if (equal val "")
+ v-or-f (intern val)))))
+ (if (not (symbolp symbol)) (message "You didn't specify a function or variable")
+ (unless (buffer-live-p buffer) (setq buffer (current-buffer)))
+ (unless (frame-live-p frame) (setq frame (selected-frame)))
+ (help-xref-interned symbol buffer frame)))
+