From 2a72e8927142436d7e55b60b25d8ae2cfe41b8b8 Mon Sep 17 00:00:00 2001
From: Joe Scott <17139430+thisiswhereitype@users.noreply.github.com>
Date: Wed, 15 May 2024 20:42:20 +0100
Subject: [PATCH] Re-added dropped line

---
 nbconvert/nbconvertapp.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nbconvert/nbconvertapp.py b/nbconvert/nbconvertapp.py
index 7f5b4ba36..cee32410f 100755
--- a/nbconvert/nbconvertapp.py
+++ b/nbconvert/nbconvertapp.py
@@ -605,6 +605,7 @@ def convert_notebooks(self):
                 "Please specify an output format with '--to <format>'."
                 f"\nThe following formats are available: {get_export_names()}"
             )
+            raise ValueError(msg)
 
         # initialize the exporter
         cls = get_exporter(self.export_format)