Bug #1678647: write a newline after printing an exception in any
case, even when converting the value to a string failed.
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 454afe4..3a9e75e 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -1226,8 +1226,8 @@
 			  err = PyFile_WriteObject(s, f, Py_PRINT_RAW);
 			Py_XDECREF(s);
 		}
-		if (err == 0)
-			err = PyFile_WriteString("\n", f);
+		/* try to write a newline in any case */
+		err += PyFile_WriteString("\n", f);
 	}
 	Py_DECREF(value);
 	/* If an error happened here, don't show it.