From c2c8b763409a37f0dd5cf77243935dc30496c802 Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Sun, 10 Dec 2023 22:15:16 +0000
Subject: [PATCH] Squelch literal \n appearing in post HTML.

For some reason this doesn't happen very often, but I just saw it for
the first time, and it totally confused Paragraph and also
ColouredString.frags. Avoid getting into that sitation in the first
place.
---
 text.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/text.py b/text.py
index 36af714..57a4d27 100644
--- a/text.py
+++ b/text.py
@@ -51,6 +51,7 @@ class ColouredString:
                 assert len(colour) == 1, "Colour ids are single characters"
                 colour = colour * len(string)
             self.s, self.c = string, colour
+        assert '\n' not in self.s, "Newlines ought to be handled elsewhere"
         self.width = cached_wcswidth(self.s)
 
     def __add__(self, rhs):
@@ -503,6 +504,7 @@ class HTMLParser(html.parser.HTMLParser):
             return
 
     def handle_data(self, data):
+        data = data.replace('\n', ' ')
         self.paras[-1].add(ColouredString(data, self.colourstack[-1]))
 
     def done(self):
-- 
2.30.2