Auto merge of #64616 - Centril:rollup-du6728f, r=Centril

Rollup of 6 pull requests

Successful merges:

 - #63448 (fix Miri discriminant handling)
 - #64592 (Point at original span when emitting unreachable lint)
 - #64601 (Fix backticks in documentation)
 - #64606 (Remove unnecessary `mut` in doc example)
 - #64611 (rustbuild: Don't package libstd twice)
 - #64613 (rustbuild: Copy crate doc files fewer times)

Failed merges:

r? @ghost

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/process.rs b/src/libstd/process.rs
index b8d57cfafea..c6dc02fea2d 100644
--- a/src/libstd/process.rs
+++ b/src/libstd/process.rs
@@ -935,7 +935,7 @@ impl Stdio {
     ///     .expect("Failed to spawn child process");
     ///
     /// {
-    ///     let mut stdin = child.stdin.as_mut().expect("Failed to open stdin");
+    ///     let stdin = child.stdin.as_mut().expect("Failed to open stdin");
     ///     stdin.write_all("Hello, world!".as_bytes()).expect("Failed to write to stdin");
     /// }
     ///