Rollup merge of rust-lang#130931 - GuillaumeGomez:standalone-crate, r…

…=notriddle

Rename `standalone` doctest attribute into `standalone_crate`

Following [zulip discussion](https://rust-lang.zulipchat.com/#narrow/stream/266220-t-rustdoc/topic/Renaming.20code.20block.20.22standalone.22.20attribute.3F) and poll results.

r? `@notriddle`

core/src/panic/location.rs

@@ -44,7 +44,7 @@ impl<'a> Location<'a> {
     ///
     /// # Examples
     ///
-    /// ```standalone
+    /// ```standalone_crate
     /// use std::panic::Location;
     ///
     /// /// Returns the [`Location`] at which it is called.