feature: `iv` should correct to `vi`

[phucisstupid]

[iffse]

2 characters are too short to give meaningful results. In this example, the iv could have the following commands as false-positives:

• ip
• id
• mv
• pv
• uv

Current design requires at least 3 characters, which doesn't give significant false-positives (e.g. if vim is not installed but nvim and vi are, suggestions would be nvim and vi)