Looking at [the `fcmp` documentation](https://docs.rs/cranelift-codegen/0.80.0/cranelift_codegen/ir/trait.InstBuilder.html#method.fcmp)--generated from Cranelift's instruction definitions, the charts explaining the logic for the various conditions is unreadable. Since rendering those charts as plain text is problematic, this change wraps them as code sections for a consistent layout.
This crate contains the metaprogram used by cranelift-codegen. It's not useful on its own.