testing colored diff

app.py

@@ -61,16 +61,22 @@ def extract_tenor_gif_url(content):
     return None
 
 
+#testing
+def escape_markdown(text: str) -> str:
+    # Escape asterisks, underscores, backticks, and pipes
+    return re.sub(r"([*_`|])", r"\\\1", text)
 
 def highlight_diff(before: str, after: str) -> tuple[str, str]:
-    matcher = SequenceMatcher(None, before, after)
+    before_escaped = escape_markdown(before)
+    after_escaped = escape_markdown(after)
+
+    matcher = SequenceMatcher(None, before_escaped, after_escaped)
     for tag, i1, i2, j1, j2 in matcher.get_opcodes():
         if tag != "equal":
-            # Bold the changed segments
-            before_highlighted = before[:i1] + "**" + before[i1:i2] + "**" + before[i2:]
-            after_highlighted = after[:j1] + "**" + after[j1:j2] + "**" + after[j2:]
+            before_highlighted = before_escaped[:i1] + "**" + before_escaped[i1:i2] + "**" + before_escaped[i2:]
+            after_highlighted = after_escaped[:j1] + "**" + after_escaped[j1:j2] + "**" + after_escaped[j2:]
             return before_highlighted, after_highlighted
-    return before, after
+    return before_escaped, after_escaped