* wl.el (wl-plugged-server-indent, wl-plugged-drawing)

* wl.el (wl-plugged-server-indent, wl-plugged-drawing)
(wl-plugged-redrawing-switch, wl-plugged-toggle): Use `(string-to-char " ")' instead of `? ', `?\ '.
* wl-action.el (wl-summary-print-argument): Ditto.
* wl-address.el (wl-complete-field-body): Ditto.
* wl-demo.el (wl-demo-insert-image): Ditto.
* wl-summary.el (wl-summary-edit-addresses-subr): Ditto.
* wl-util.el (wl-ask-folder, wl-set-string-width)
(wl-y-or-n-p-with-scroll): Ditto.