Remove VI option defaults. Part 1 (letters a-c).
Remove VI option defaults. Part 2 (letters d-g).
Remove VI option defaults. Part 3 (letters h-l).
Remove VI option defaults. Part 4 (letters m-r).
Remove VI option defaults. Part 5 (letter s).
Remove VI option defaults. Part 6 (letters t-w).
Remove VI option defaults. Part 7 (cleanup).