Problem: Blockwise insert does not handle autoindent properly when tab is
inserted.
Solution: Adjust text column for indent before computing column.
(closes#9229)
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: Deleting in a block selection causes problems.
Solution: Check the length of the line before adding bd.textcol and
bd.textlen. (Christian Brabandt, closes#2825)
