Beyond viewing each page and using whatever your browser provides to print a page I don't know.
It's not really something one would often do.
Browsers can usually save HTML pages or the text of the pages to disk and they can then be cut and pasted together to produce a single document, or you could just copy and paste from what's shown on screen.
The thread had 11 Forum pages which worked out to about 200 - 8 1/2 x11 pages.
We copied, archived and printed them.
So much easier to study in book form and we can copy and paste the code to the editor as needed.