Wrong `pub` modifier in each function of trait documentation

[tesuji]

The documentation of Iterator trait on 1.49.0 (current stable) doesn't contain pub modifier in function declaration of that trait.

However, on beta and nightly, there is pub modifier.

This is wrong because you cannot use pub modifier for each method/function in Trait definition.
Why is this important? People copy the method/function declaration in the documentation to their code
and see the compiler error: error[E0449]: unnecessary visibility qualifier.

Meta

rustc --version --verbose:

rustc 1.49.0 (e1884a8e3 2020-12-29)
binary: rustc
commit-hash: e1884a8e3c3e813aada8254edfa120e85bf5ffca
commit-date: 2020-12-29
host: x86_64-unknown-linux-gnu
release: 1.49.0

cc @jyn514 I think this might relate to some changes in visibility around macros ?

[jyn514]

Yes, this needs the same fix as #77820 (comment) (in particular

rust/src/librustdoc/clean/mod.rs

Lines 1732 to 1733 in 0e1a302

	// Don't show `pub` for fields on enum variants; they are always public
	Item { visibility: self.vis.clean(cx), ..what_rustc_thinks }

should work).

[camelid]

Self-assigning because this is a beta regression.

[camelid]

Note that this also occurs for the impl's docs.