gh-121746: Bind Alt+Enter to "accept" in the REPL (GH-121754)

Lib/_pyrepl/reader.py

diff --git a/Lib/_pyrepl/reader.py b/Lib/_pyrepl/reader.py
index b2da038..8b282a3 100644
--- a/Lib/_pyrepl/reader.py
+++ b/Lib/_pyrepl/reader.py
@@ -130,7 +130,7 @@ def make_default_commands() -> dict[CommandName, type[Command]]:
         (r"\M-7", "digit-arg"),
         (r"\M-8", "digit-arg"),
         (r"\M-9", "digit-arg"),
-        # (r'\M-\n', 'insert-nl'),
+        (r"\M-\n", "accept"),
         ("\\\\", "self-insert"),
         (r"\x1b[200~", "enable_bracketed_paste"),
         (r"\x1b[201~", "disable_bracketed_paste"),

Misc/ACKS

diff --git a/Misc/ACKS b/Misc/ACKS
index 53258db..6008f9e 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1670,6 +1670,7 @@
 Jiwon Seo
 Iñigo Serna
 Joakim Sernbrant
+Rodrigo Girão Serrão
 Roger D. Serwy
 Jerry Seutter
 Pete Sevander