GHC.StgToCmm.Monad documentation out of sync?

All, I'm looking at the paragraph starting on line 271 of GHC.StgToCmm.Monad, which purports to explain ReturnKind. But the labels mentioned in the paragraph don't seem to match the preceding code example. Also, I don't understand why only one branch of the `case` expression seems to be protected by a heap-limit check. I understand what I'm seeing well enough to fear that something is wrong, but not well enough to fix it. Is someone else willing to have a look and maybe we can repair the documentation together? Noramn