Chris Cannam - 2020-01-09

Hi - it's the README that's wrong I'm afraid, the option really isn't supported. This is because the lab reader has no ability to include the source filename in the output, so a lab-one-file option would just merge lots of features without making it clear where they came from.

The CSV writer is more fully-featured and can also write tab-separated files (--csv-separator '\t')