The sbt supershell, introduced in sbt-1.3, doesn't play well with comint-mode. Disabling it removes the unwanted control sequences and restores tab completion.
I've also made a commit to sbt to disable it automatically from their side when dump terminal is detected. It will only disable the supershell, not all colors. We can merge this now.
The sbt supershell, introduced in sbt-1.3, doesn't play well with comint-mode. Disabling it removes the unwanted control sequences and restores tab completion.