When we added support for \f{} in Halibut, one spot was missed.
Emphasized index entries (\i\e{}) are not supposed to show up emphasized in the index (and they don't). Presumably, strong (\i\f{}) entries should also show up as plain text, but they are showing up bold.
Here's what it says in section 3.5.2 of the Halibut documentation:
[There is] an expectation that most people indexing a word of computer code will still want it to look like code in the index, whereas most people indexing an emphasised word will not want it emphasised in the index.
The attached patch appears to fix this.
Anonymous