From bc8f0081056bf002311f0db8eee54367ec4b641b Mon Sep 17 00:00:00 2001
From: Joerg Wunsch <j@uriah.heep.sax.de>
Date: Thu, 28 Mar 2024 15:37:56 +0100
Subject: [PATCH] Do not attempt to add <br> if there is no HTML text

Happens for trace messages.
---
 src/python/adgui.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/python/adgui.py b/src/python/adgui.py
index 9d704a7d..2729d9c7 100755
--- a/src/python/adgui.py
+++ b/src/python/adgui.py
@@ -256,7 +256,7 @@ class adgui(QObject):
             html = f"<font color={color}><strong>{s}</strong></font>"
         elif level < ad.MSG_TRACE:
             html = f"<font color={color}>{s}</font>"
-        if not no_nl or s[-1] == '\n':
+        if html and (not no_nl or s[-1] == '\n'):
             html += "<br>\n"
         if s != "" and s != "\n":
             new_bol = not no_nl or (s[-1] == '\n')