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 8fa7d01..859e910 100644
--- a/Lib/cmd.py
+++ b/Lib/cmd.py
@@ -205,6 +205,8 @@
         if cmd is None:
             return self.default(line)
         self.lastcmd = line
+        if line == 'EOF' :
+            self.lastcmd = ''
         if cmd == '':
             return self.default(line)
         else: