Correct float docs for wasmparser::BinaryReader

[samestep]

This PR corrects the docstrings for wasmparser::BinaryReader::read_f32 and wasmparser::BinaryReader::read_f64, which were previously identical to each other and both incorrect.

[samestep]

I'm guessing this build error is unrelated?

error: missing documentation for a constant
  --> crates/wast/src/lexer.rs:65:1
   |
64 |   #[test]
   |   ------- in this procedural macro expansion
65 | / fn token_is_not_too_big() {
66 | |     assert!(std::mem::size_of::<Token>() <= std::mem::size_of::<u64>() * 2);
67 | | }
   | |_^
   |
note: the lint level is defined here
  --> crates/wast/src/lib.rs:53:9
   |
53 | #![deny(missing_docs, rustdoc::broken_intra_doc_links)]
   |         ^^^^^^^^^^^^
   = note: this error originates in the attribute macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)

error: could not compile `wast` (lib test) due to 1 previous error

[alexcrichton]

Ah that looks like a nightly issue/regression, I'll work on getting that fixed, will let you know!

[alexcrichton]

Ok mind rebasing on main now that #1778 has merged? That should fix the CI issues here

[samestep]

@alexcrichton done! (And the same effect would have been achieved even if I had just pushed a dummy commit instead of actually merging/rebasing onto main, since the GitHub Actions pull_request event automatically creates a synthetic merge commit with the target branch before running CI.)