Put rustdoc --test ui check at the end of docs check

Author: GuillaumeGomez

src/bootstrap/check.rs

@@ -275,6 +275,7 @@ pub fn docs(build: &Build, compiler: &Compiler) {
         println!("doc tests for: {}", p.display());
         markdown_test(build, compiler, &p);
     }
+    markdown_test(build, compiler, &output);
 }
 
 /// Run the error index generator tool to execute the tests located in the error
@@ -296,8 +297,6 @@ pub fn error_index(build: &Build, compiler: &Compiler) {
                    .arg("markdown")
                    .arg(&output)
                    .env("CFG_BUILD", &build.config.build));
-
-    markdown_test(build, compiler, &output);
 }
 
 fn markdown_test(build: &Build, compiler: &Compiler, markdown: &Path) {

src/bootstrap/step.rs

@@ -474,11 +474,6 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
          .default(true)
          .host(true)
          .run(move |s| check::docs(build, &s.compiler()));
-    rules.test("check-rustdoc-output", "src/test/rustdoc-test")
-         .dep(|s| s.name("libtest"))
-         .default(true)
-         .host(true)
-         .run(move |s| check::markdown_test_output_check(build, &s.compiler()));
     rules.test("check-distcheck", "distcheck")
          .dep(|s| s.name("dist-src"))
          .run(move |_| check::distcheck(build));