style(dotfiles): apply style fixes
style(dotfiles): apply style fixes

Just matching the style used elsewhere in this file:

- No breathing room inside $(()) expressions.
- Uppercase variable names.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent