Wrong coverage output with Babel about istanbul-instrumenter-loader

[foolip]

I've tried both post and pre now:
GoogleChromeLabs/confluence#403
GoogleChromeLabs/confluence#404

As expected, enforce: 'pre' is what fixes the line numbering, since the instrumentation is otherwise done on the babel output. I've sent #93 in the hope that it's just a typo in the documentation, but I'm not certain that it is, something else might break?

[mcsmcs]

Can confirm switching to enforce: 'pre' corrects the output.

[foolip]

I'm seeing a similar problem with the number of lines being affected by the combination of babel-loader and istanbul-instrumenter-loader. https://github.com/webpack-contrib/istanbul-instrumenter-loader#with-babel suggests enforce: 'post' which is surprising. I'll try both that and enforce: 'pre' as seems to have worked for @mcsmcs.