better suggestion for duplicated where clause

[compiler-errors]

fixes #93567

[rust-highfive]

r? @lcnr

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[lcnr]

this is already good, do you think that extending the lint to cover

struct A where (): Sized, where (): Sized {}
//~^ ERROR cannot define duplicate `where` clauses on an item

fn foo() where (): Sized, where (): Sized {}
//~^ ERROR cannot define duplicate `where` clauses on an item

enum B where (): Sized, where (): Sized {}
//~^ ERROR cannot define duplicate `where` clauses on an item

fn main() {}

is also worth it. i.e. deal with , where?

if you don't want to deal with that, r=me

[compiler-errors]

Good point. I'll do that too, seems like something that someone might accidentally type.

[compiler-errors]

@rustbot author

[compiler-errors]

@rustbot ready

[lcnr]

@bors r+ rollup

thanks ❤️

[bors]

📌 Commit f35d43c has been approved by lcnr