scroll-up should retain column by default

[Dan Jacobson]

$ wget http://www.ilgradio.com/ilgradio-files/ILGBTEXT.ZIP #or any file with 
300 char lines
$ unzip ILGBTEXT.ZIP
$ emacs -q --no-site-file -nw -eval '(toggle-truncate-lines)' ILGSTEXT.TXT
#(Oh, no effect there, regardless of the cheery "enabled" message. Must do it 
again:)
ESC x toggle-truncate-lines RET C-e C-v
Note that we are unhappily sent back to the first column.
Wait, if one did C-x < instead of C-e, then it would have remembered
the column. Therefore, look into C-e.