Close #13500: Hitting EOF gets cmd.py into a infinite EOF on return loop
diff --git a/Lib/cmd.py b/Lib/cmd.py
index 29ea460..ae7f12e 100644
--- a/Lib/cmd.py
+++ b/Lib/cmd.py
@@ -209,6 +209,8 @@
         if cmd is None:
             return self.default(line)
         self.lastcmd = line
+        if line == 'EOF' :
+            self.lastcmd = ''
         if cmd == '':
             return self.default(line)
         else: