Auto merge of #40072 - GuillaumeGomez:rollup, r=GuillaumeGomez

Rollup of 11 pull requests

- Successful merges: #39777, #39815, #39845, #39886, #39940, #40010, #40030, #40048, #40050, #40052, #40071
- Failed merges:

1 files changed, 6 insertions, 3 deletions

diff --git a/src/libstd/thread/mod.rs b/src/libstd/thread/mod.rs
index 93e320c4522..2bc066d3fea 100644
--- a/src/libstd/thread/mod.rs
+++ b/src/libstd/thread/mod.rs
@@ -235,7 +235,7 @@ pub use self::local::{LocalKey, LocalKeyState};
 pub struct Builder {
     // A name for the thread-to-be, for identification in panic messages
     name: Option<String>,
-    // The size of the stack for the spawned thread
+    // The size of the stack for the spawned thread in bytes
     stack_size: Option<usize>,
 }
 
@@ -289,14 +289,17 @@ impl Builder {
         self
     }
 
-    /// Sets the size of the stack for the new thread.
+    /// Sets the size of the stack (in bytes) for the new thread.
+    ///
+    /// The actual stack size may be greater than this value if
+    /// the platform specifies minimal stack size.
     ///
     /// # Examples
     ///
     /// ```
     /// use std::thread;
     ///
-    /// let builder = thread::Builder::new().stack_size(10);
+    /// let builder = thread::Builder::new().stack_size(32 * 1024);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     pub fn stack_size(mut self, size: usize) -> Builder {