add commands finding the nth occurence
new commands
- `ar-delete-comments-in-def'

- `ar-greedy-search-backward-regexp'
  Match backward the whole expression as search-forward would do. "
`ar-hide-bracketed-in-line-atpt' fixed

new commands
- `ar-delete-comments-in-def'

- `ar-greedy-search-backward-regexp'
  Match backward the whole expression as search-forward would do. "