Case insensitivitiy can't be disabled

[maxigaz]

When I try setting the option case_insensitive to false, it doesn't seem to affect whether upper or lowercase characters are matched or not.

Here's an elaborate example:

1. Run :lua require'hop'.setup{ case_insensitive = 'false' } or load the minimal init.lua below
2. Open a new buffer
3. Write asdfgASDFG
4. Move the cursor to the first character
5. Run :HopChar1
6. Press d

The result is that D becomes hinted and I can jump on it. The expected behaviour would be that the cursor immediately jumps to d, because that would be the only match.

I can reproduce this in Neovim v0.5.0-dev+1459-g384f9870f with a minimal init.lua:

vim.cmd([[let $PLUGIN_DIRECTORY = '~/.local/share/nvim/plugtest']])
vim.cmd([[packadd hop.nvim]])

require'hop'.setup {
  case_insensitive = 'false',
}