From 63d458bd785d2379bab80d01ffc5249f9ce1f9a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Peter=20G=C3=B6tz?= <peter.gtz@gmail.com>
Date: Fri, 11 Nov 2022 22:03:09 +0100
Subject: [PATCH] Allow prompt_templates without %s

This makes it possible to specify empty prompts in the configuration
---
 src/nbsphinx.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/nbsphinx.py b/src/nbsphinx.py
index a771b203..81205d85 100644
--- a/src/nbsphinx.py
+++ b/src/nbsphinx.py
@@ -1175,7 +1175,10 @@ def _create_code_nodes(directive):
 
     outer_node = docutils.nodes.container(classes=outer_classes)
     if execution_count:
-        prompt = prompt_template % (execution_count,)
+        if '%s' in prompt_template:
+            prompt = prompt_template % (execution_count,)
+        else:
+            prompt = prompt_template
         prompt_node = docutils.nodes.literal_block(
             prompt, prompt, language='none', classes=['prompt'])
     else: