Text after diff block is not rendered

[Jun Omae]

I enter the following text in ticket comment, but diff block only is rendered. "This text disappears" is not rendered. Removing {{{ after ==== Python Traceback ==== line, the issue goes away.

{{{#!diff
diff --git a/trac/web/main.py b/trac/web/main.py
index c75199f79..4479ac5a0 100644
--- a/trac/web/main.py
+++ b/trac/web/main.py
@@ -761,12 +760,13 @@ def send_internal_error(env, req, exc_info):
             %(interface_customization)s
             ==== Python Traceback ====
             {{{
-            %(traceback)s}}}"""),
-            method=req.method, path_info=req.path_info,
-            req_args=pformat(req.args), sys_info=sys_info,
-            enabled_plugins=enabled_plugins,
-            interface_customization=interface_files,
-            traceback=to_unicode(traceback))
+            %(traceback)s}}}""")
+        return gettext(msgid,
+                       method=req.method, path_info=req.path_info,
+                       req_args=pformat(req.args), sys_info=sys_info,
+                       enabled_plugins=enabled_plugins,
+                       interface_customization=interface_files,
+                       traceback=to_unicode(traceback))

     # Generate the description once in English, once in the current locale
     description_en = get_description(lambda s, **kw: safefmt(s, kw))
}}}
This text disappears....
}}}

[Jun Omae]

I noticed the behavior is by design because code blocks {{{ and }}} can be nested. However, it confuses me with no warnings even though }}} is missing.