Support ignoring un-escaped commas when parsing property values?

[da4089]

See Kozea/Radicale#1558

[da4089]

This might also apply to SEMI-COLON values, also supposed to be escaped in text values, but possibly not in some cases.

[pinchartl]

I've been bitten by this issue today. I can try to submit a fix, but I'd like guidance on how to handle it properly. The following change "fixes" the problem for me:

diff --git a/vobject/icalendar.py b/vobject/icalendar.py
index 6ce550227bc1..7c464ce57ebc 100644
--- a/vobject/icalendar.py
+++ b/vobject/icalendar.py
@@ -693,7 +693,7 @@ class TextBehavior(behavior.Behavior):
             if encoding and encoding.upper() == cls.base64string:
                 line.value = base64.b64decode(line.value)
             else:
-                line.value = stringToTextValues(line.value)[0]
+                line.value = stringToTextValues(line.value, listSeparator=None)[0]
             line.encoded = False
 
     @classmethod

It feels too simple though. Or can I assume TextBehavior is only be used for single-value fields, and unconditionally disable splitting on unescaped commas ?