doc: Mention that writeln! and println! always use LF

Fixes #34697

1 files changed, 2 insertions, 0 deletions

diff --git a/src/libcore/macros.rs b/src/libcore/macros.rs
index 376d2792c44..43868d124a2 100644
--- a/src/libcore/macros.rs
+++ b/src/libcore/macros.rs
@@ -238,6 +238,8 @@ macro_rules! write {
 }
 
 /// Use the `format!` syntax to write data into a buffer, appending a newline.
+/// On all platforms, the newline is the LINE FEED character (`\n`/`U+000A`)
+/// alone (no additional CARRIAGE RETURN (`\r`/`U+000D`).
 ///
 /// This macro is typically used with a buffer of `&mut `[`Write`][write].
 ///