Auto merge of #136918 - GuillaumeGomez:rollup-f6h21gg, r=GuillaumeGomez

Rollup of 8 pull requests

Successful merges:

 - #134981 ( Explain that in paths generics can't be set on both the enum and the variant)
 - #136698 (Replace i686-unknown-redox target with i586-unknown-redox)
 - #136767 (improve host/cross target checking)
 - #136829 ([rustdoc] Move line numbers into the `<code>` directly)
 - #136875 (Rustc dev guide subtree update)
 - #136900 (compiler: replace `ExternAbi::name` calls with formatters)
 - #136913 (Put kobzol back on review rotation)
 - #136915 (documentation fix: `f16` and `f128` are not double-precision)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs

@@ -367,9 +367,7 @@ fn push_debuginfo_type_name<'tcx>(
                 output.push_str(sig.safety.prefix_str());
 
                 if sig.abi != rustc_abi::ExternAbi::Rust {
-                    output.push_str("extern \"");
-                    output.push_str(sig.abi.name());
-                    output.push_str("\" ");
+                    let _ = write!(output, "extern {} ", sig.abi);
                 }
 
                 output.push_str("fn(");

compiler/rustc_errors/src/diagnostic_impls.rs

@@ -93,6 +93,7 @@ into_diag_arg_using_display!(
     SplitDebuginfo,
     ExitStatus,
     ErrCode,
+    rustc_abi::ExternAbi,
 );
 
 impl<I: rustc_type_ir::Interner> IntoDiagArg for rustc_type_ir::TraitRef<I> {