Problem: Cursor position invalid when scrolling with 'smoothscroll' set.
(Ernie Rael)
Solution: Add w_valid_skipcol and clear flags when it changes. Adjust
w_skipcol after moving the cursor.
Problem: With 'smoothscroll' and 'scrolloff' non-zero the cursor position
is not properly adjusted in a long line.
Solution: Move the cursor further up or down in the line.
Problem: Cursor line only partly shows with 'smoothscroll' and 'scrolloff'
zero.
Solution: Do not use 'smoothscroll' when adjusting the bottom of the window.
(closes#11269)
Problem: with 'smoothscroll' set CTRL-E does not work properly when
'foldmethod' is set to "indent". (Yee Cheng Chin)
Solution: Merge the code for scroling with folds and 'smoothscroll'.
(closes#11262)
Problem: Various inconsistencies in test files.
Solution: Add modelines where they were missing. Use Check commands instead
of silently skipping over tests. Adjust indents and comments.
(Ken Takata, closes#6695)
Problem: ":set scroll&" often gives an error.
Solution: Don't use a fixed default value, use half the window height. Add a
test. (Ozaki Kiichi, closes#2104)
