Rollup merge of #59175 - Zoxc:fix-process-test, r=alexcrichton

Don't run test launching `echo` since that doesn't exist on Windows

src/bootstrap/builder.rs

@@ -408,11 +408,11 @@ impl<'a> Builder<'a> {
  test::RustdocJSStd,
  test::RustdocJSNotStd,
  test::RustdocTheme,
+ test::RustdocUi,
  // Run bootstrap close to the end as it's unlikely to fail
  test::Bootstrap,
  // Run run-make last, since these won't pass without make on Windows
  test::RunMake,
- test::RustdocUi
  ),
  Kind::Bench => describe!(test::Crate, test::CrateLibrustc),
  Kind::Doc => describe!(

src/libstd/process.rs

@@ -8,7 +8,7 @@
 //!
 //! The [`Command`] struct is used to configure and spawn processes:
 //!
-//! ```
+//! ```no_run
 //! use std::process::Command;
 //!
 //! let output = Command::new("echo")