Terminal
========
After step 3 the cursor is at line #2 column #5 (beginning of word
test). In mode-line the position is tracked as (1,70), where it was
before. In the echo are a ``nil´´ has appeared.
After evaluating step 4 nothing changes, except: the echo area now
contains: ``End of buffer´´.
I can only reproduce this (your last sentence), if I do `M-:
(scroll-up)' (same as pressing the NEXT (Page Down) key). When I
instead do `M-: (scroll-up 1), I get what I reported in my OP (but I
neglected to add that, with emacs -Q -nw, after step 4 the cursor is
now at column 83 instead of 70).