Position cursor at first line of git commit message

This started being an issue again and I'm not sure why. Since I always
want to be at the top of the commit message when I open the editor to
write a message, explicitly set the cursor position every time.
Remove comment markers when joining lines

When joining lines like the following:

  # Hello
  # World

...enabling this option will result in the following happening:

  # Hello World

...instead of:

  # Hello # World

Amazing.