Stabilize --test-runtool and --test-runtool-arg

Author: ehuss

src/doc/rustdoc/src/command-line-arguments.md

@@ -222,6 +222,23 @@ For more, see [the chapter on documentation tests](write-documentation/documenta
 
 See also `--test`.
 
+## `--test-runtool`, `--test-runtool-arg`: program to run tests with; args to pass to it
+
+Using these options looks like this:
+
+```bash
+$ rustdoc src/lib.rs --test-runtool runner --test-runtool-arg --do-thing --test-runtool-arg --do-other-thing
+```
+
+These options can be used to run the doctest under a program, and also pass arguments to
+that program. For example, if you want to run your doctests under valgrind you might run
+
+```bash
+$ rustdoc src/lib.rs --test-runtool valgrind
+```
+
+Another use case would be to run a test inside an emulator, or through a Virtual Machine.
+
 ## `--target`: generate documentation for the specified target triple
 
 Using this flag looks like this:

src/doc/rustdoc/src/unstable-features.md

@@ -666,25 +666,6 @@ struct Foo;
 In older versions, this will be ignored on all targets, but on newer versions `ignore-gnu` will
 override `ignore`.
 
-## `--test-runtool`, `--test-runtool-arg`: program to run tests with; args to pass to it
-
- * Tracking issue: [#64245](https://github.com/rust-lang/rust/issues/64245)
-
-Using these options looks like this:
-
-```bash
-$ rustdoc src/lib.rs -Z unstable-options --test-runtool runner --test-runtool-arg --do-thing --test-runtool-arg --do-other-thing
-```
-
-These options can be used to run the doctest under a program, and also pass arguments to
-that program. For example, if you want to run your doctests under valgrind you might run
-
-```bash
-$ rustdoc src/lib.rs -Z unstable-options --test-runtool valgrind
-```
-
-Another use case would be to run a test inside an emulator, or through a Virtual Machine.
-
 ## `--with-examples`: include examples of uses of items as documentation
 
  * Tracking issue: [#88791](https://github.com/rust-lang/rust/issues/88791)

src/librustdoc/lib.rs

@@ -515,15 +515,15 @@ fn opts() -> Vec<RustcOptGroup> {
             "",
         ),
         opt(
-            Unstable,
+            Stable,
             Opt,
             "",
             "test-runtool",
             "",
             "The tool to run tests with when building for a different target than host",
         ),
         opt(
-            Unstable,
+            Stable,
             Multi,
             "",
             "test-runtool-arg",

tests/rustdoc/doctest/doctest-runtool.rs

@@ -6,7 +6,6 @@
 //@ compile-flags: --test-runtool=auxiliary/bin/doctest-runtool
 //@ compile-flags: --test-runtool-arg=arg1 --test-runtool-arg
 //@ compile-flags: 'arg2 with space'
-//@ compile-flags: -Zunstable-options
 
 /// ```
 /// assert_eq!(std::env::var("DOCTEST_RUNTOOL_CHECK"), Ok("xyz".to_string()));