bug#22813: 24.5; doc string of `apropos-variable' - mention C-u

[Kaushal Modi]

In the emacs-25 branch, I see the doc-string for apropos-variable as:

"Show variables that match PATTERN.

When DO-NOT-ALL is non-nil, show user options only, i.e. behave

like `apropos-user-option'."

How about the below patch:

diff --git a/lisp/apropos.el b/lisp/apropos.el

index 3c1a413..fdd85b4 100644

--- a/lisp/apropos.el

+++ b/lisp/apropos.el

@@ -505,7 +505,7 @@ apropos-user-option

 ;;;###autoload

 (defun apropos-variable (pattern &optional do-not-all)

   "Show variables that match PATTERN.

-When DO-NOT-ALL is non-nil, show user options only, i.e. behave

+With prefix argument DO-NOT-ALL non-nil, show user options only, i.e. behave

 like `apropos-user-option'."

   (interactive (list (apropos-read-pattern

       (if current-prefix-arg "user option" "variable"))

I simply added the term "prefix argument" (based on the doc-string of quit-window).

--
Kaushal Modi