Links with italic do not work

[dotchev]

In README.md

### New _feature_

generated TOC

- [New _feature_](#new-_feature_)

Actual link revealed by pointing the heading in GitHub https://github.com/dotchev/Spoon-Knife#new-feature Notice that GitHub strips the underscores in the link.

But italic with stars works correctly

### New *feature B*

is linked like this

- [New *feature B*](#new-feature-b)

[shellscape]

1.5 years later and this is still an open, and valid, issue.