VIM multi-line editing using visual multi-line mode and visual block mode
1. V + [line number] G -- visual multi-line mode
2. Shift + [greater than] or [less than] -- indent / unindent
3. Ctrl V + [line number] G -- visual block mode
4. Shift i -- multi-cursor insert
5. Under visual block mode, $ -- move cursors to end of line
6. A -- append at the end of each line