Add -name argument for Xephyr (#2937)
Add -name argument for Xephyr (#2937)

This way you can assign the test windows to an empty workspace to avoid
interacting with them (when xvfb-run is not an option):
assign [instance="i3test"] workspace testing
i3/i3,stapelberg/i3,i3/i3,cornerman/i3,stapelberg/i3,cornerman/i3,Airblader/i3-original,Airblader/i3-original,cornerman/i3,Airblader/i3,stapelberg/i3,Airblader/i3-original,Airblader/i3-original,Airblader/i3,Airblader/i3-original,i3/i3,stapelberg/i3,Airblader/i3,cornerman/i3,Airblader/i3,i3/i3