bug#70600: trailing whitespace spotted in join info pages

[Dan Jacobson]

The join info pages have tons of trailing whitespace.
sed s/$/$/ reveals:

‘sort -u file1 file2’                Union of unsorted files$
                                     $
‘sort file1 file2 | uniq -d’         Intersection of unsorted files$
                                     $
‘sort file1 file1 file2 | uniq -u’   Difference of unsorted files$
                                     $
‘sort file1 file2 | uniq -u’         Symmetric Difference of unsorted$
                                     files$

Or in emacs
(progn
  (setq-default show-trailing-whitespace t)
  (info "(coreutils) Set operations"))
will drive home the point.
Same with some other pages in that manual.

Why bad? It says that whatever typesetting program you are using, is
like a broken Xerox machine that is spitting out extra blank pages,
wasting paper. Even if we're rich so who cares.