And so on from other VCS. This causes confusion (ref #255) when watching
from outside a git repo, where the VCS type isn’t detected so the .git
folder is included in the watchset. While slightly incorrect, it’s more
expected that these folders be ignored regardless, and there’s always
--no-default-ignore to avoid those ignores if needed.
The options were out of date (e.g. `-d` was debug). This updates them to
match the help text.
This also adds some documentation about separating the command with --
so that clap doesn't eat the flags intended for the command.