Autoupdate a coverage badge in your README.md with this one dumb trick!

To try it out:

go get github.com/natefinch/covergen

Then run go test:

go test

Now run git diff... the url for the coverage badge in README.md is updated automagically! No other commands need be run.

Check out covergen_test.go for how it works.

The only drawback is that you more than double the time it takes to run your tests...