Migrate run-make/rustdoc-error-lines to rmake.rs

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -244,7 +244,6 @@ run-make/rlib-format-packed-bundled-libs-3/Makefile
 run-make/rlib-format-packed-bundled-libs/Makefile
 run-make/rmeta-preferred/Makefile
 run-make/rustc-macro-dep-files/Makefile
-run-make/rustdoc-error-lines/Makefile
 run-make/rustdoc-io-error/Makefile
 run-make/rustdoc-map-file/Makefile
 run-make/rustdoc-output-path/Makefile

tests/run-make/rustdoc-error-lines/rmake.rs

@@ -0,0 +1,22 @@
+// Assert that the search index is generated deterministically, regardless of the
+// order that crates are documented in.
+
+use run_make_support::rustdoc;
+
+fn main() {
+    let output =
+        String::from_utf8(rustdoc().input("input.rs").arg("--test").command_output().stdout)
+            .unwrap();
+
+    let should_contain = &[
+        "input.rs - foo (line 5)",
+        "input.rs:7:15",
+        "input.rs - bar (line 15)",
+        "input.rs:17:15",
+        "input.rs - bar (line 24)",
+        "input.rs:26:15",
+    ];
+    for text in should_contain {
+        assert!(output.contains(text), "output doesn't contains {:?}", text);
+    }
+}