Update error message
Do not rely on raw version when using save() for subdelimited fields, use recursive_join instead
Add more primitives to test fields
Use _isFieldRaw instead of manually testing if @raw
Use _isFieldSpecial instead of manually testing if starts with __
New self._isFieldDelimited to test split fields
For every delimited field in --show, not only defaults, we convert to raw version
Adding comment
Add _convertFieldToRaw
_isSpecialField has been moved to _isFieldNormal (consistency)
Use self._isFieldDelimited when saving too