Now when you delete a word in a promp it will work more like how it
works in bash. If the text dose not end in a letter then the last word
and all of the tailing special characters will be deleted. If the text
dose end in a letter then only the last word will be deleted leaving the
special characters that are before the last word.
Examples:
| Before | After |
| -------------------| ----------- |
| `some word` | `some ` |
| `some word` | `some ` |
| `some word ` | `some ` |
Now you can open the currently selected item in a vertical split or a
horizontal split. The completion callback must support the current
actions.
There is also a bit of testing in here. The vim mock has been refactored
and split out so we can use it multiple tests.
