I don't look at my keyboard when I type (I don't think a lot of people do these days) and I catch myself occasionally pressing 'u' in visual mode by mistake.
This causes all the text in a visual bloc to go lower case.
It's happened multiple times and I would really want to disable this functionality. I am aware that I can use
~ to change case.
How can I disable
u during visual mode (lowercasing) but not