Toggle Case in Vim

Commands you practise

~

~ toggles the case of the character under the cursor. It is the fastest way to fix capitalization typos without entering Insert mode.

Levels

1. Snake Case Shakeup (easy): Quickly fix the three casing errors in this Python function.
2. Yelling in YAML (medium): Invert the capitalization of all quoted values.
3. Block Party Swap (hard): Use visual blocks to flip the casing of both status columns.

Each level opens a real Neovim session in your browser with a start file and a target file. Edit one into the other in as few keystrokes as you can, then race the vimbot's solution.