bug#38698: gnus-article-fill-long-lines documentation mysteries

[積丹尼 Dan Jacobson]

C-h k W Q

    W Q runs the command gnus-article-fill-long-lines (found in
    gnus-summary-mode-map), which is an interactive Lisp function in
    ‘gnus-art.el’.

OK, but when we 'click' 'gnus-art.el' we get the message
"Unable to find location in file"!

    It is bound to W Q, <menu-bar> <Article> <Washing> <Fill long lines>.

    (gnus-article-fill-long-lines &optional INTERACTIVE &rest ARGS)

    Fill lines that are wider than the window width.

OK, but my window is hundreds of columns wide. But it still fills to
about 80. So the "window width" is not the whole story apparently, and
needs to be rephrased.

Also it would seem great if one could do e.g., M-x 111 W Q to get it to fill
to 111 columns.

Gnus v5.13
GNU Emacs 26.3 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.11)
 of 2019-09-23, modified by Debian