Update std doctests

Author: GuillaumeGomez

library/std/src/error.rs

@@ -123,7 +123,7 @@ use crate::fmt::{self, Write};
 /// the `Debug` output means `Report` is an ideal starting place for formatting errors returned
 /// from `main`.
 ///
-/// ```should_panic
+/// ```
 /// #![feature(error_reporter)]
 /// use std::error::Report;
 /// # use std::error::Error;
@@ -154,10 +154,14 @@ use crate::fmt::{self, Write};
 /// #     Err(SuperError { source: SuperErrorSideKick })
 /// # }
 ///
-/// fn main() -> Result<(), Report<SuperError>> {
+/// fn run() -> Result<(), Report<SuperError>> { {
 ///     get_super_error()?;
 ///     Ok(())
 /// }
+///
+/// fn main() {
+///     assert!(run().is_err());
+/// }
 /// ```
 ///
 /// This example produces the following output:
@@ -170,7 +174,7 @@ use crate::fmt::{self, Write};
 /// output format. If you want to make sure your `Report`s are pretty printed and include backtrace
 /// you will need to manually convert and enable those flags.
 ///
-/// ```should_panic
+/// ```
 /// #![feature(error_reporter)]
 /// use std::error::Report;
 /// # use std::error::Error;
@@ -201,12 +205,16 @@ use crate::fmt::{self, Write};
 /// #     Err(SuperError { source: SuperErrorSideKick })
 /// # }
 ///
-/// fn main() -> Result<(), Report<SuperError>> {
+/// fn run() -> Result<(), Report<SuperError>> {
 ///     get_super_error()
 ///         .map_err(Report::from)
 ///         .map_err(|r| r.pretty(true).show_backtrace(true))?;
 ///     Ok(())
 /// }
+///
+/// fn main() {
+///     assert!(run().is_err());
+/// }
 /// ```
 ///
 /// This example produces the following output:

tests/rustdoc-ui/doctest/failed-doctest-should-panic-2021.stdout

@@ -5,7 +5,7 @@ test $DIR/failed-doctest-should-panic-2021.rs - Foo (line 10) ... FAILED
 failures:
 
 ---- $DIR/failed-doctest-should-panic-2021.rs - Foo (line 10) stdout ----
-Test executable succeeded, but it's marked `should_panic`.
+Test didn't panic, but it's marked `should_panic`.
 
 failures:
     $DIR/failed-doctest-should-panic-2021.rs - Foo (line 10)

tests/rustdoc-ui/doctest/failed-doctest-should-panic.stdout

@@ -1,11 +1,12 @@
 
 running 1 test
-test $DIR/failed-doctest-should-panic.rs - Foo (line 10) - should panic ... FAILED
+test $DIR/failed-doctest-should-panic.rs - Foo (line 10) ... FAILED
 
 failures:
 
 ---- $DIR/failed-doctest-should-panic.rs - Foo (line 10) stdout ----
-note: test did not panic as expected at $DIR/failed-doctest-should-panic.rs:10:0
+Test didn't panic, but it's marked `should_panic`.
+
 
 failures:
     $DIR/failed-doctest-should-panic.rs - Foo (line 10)

tests/rustdoc-ui/doctest/wrong-ast-2024.stdout

@@ -1,6 +1,6 @@
 
 running 1 test
-test $DIR/wrong-ast-2024.rs - three (line 18) - should panic ... ok
+test $DIR/wrong-ast-2024.rs - three (line 18) ... ok
 
 test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in $TIME