What version of ripgrep are you using?

ripgrep 0.8.1

What operating system are you using ripgrep on?

macOS High Sierra

Bug

This command detects multiple -v params:

$ rg -ve foo -ve bar /dev/null
error: The argument '--invert-match' was provided more than once, but cannot be used multiple times

This doesn't:

$ rg -ve foo -v -e bar /dev/null

Also this one:

$ rg -v -e foo --invert-match --invert-match -e bar /dev/null

I'm not sure what should be the expected behaviour, but I think it's not consistent.