Officially, an XML declaration requires its attributes to be in the order: version, encoding, and then standalone.
See for instance: https://xmlwriter.net/xml_guide/xml_declaration.shtml.
Unfortunately, jtm seems to store all attributes in a data structure that does not preserve order, which is
perfectly all right for any regular element's attributes.
A simple fix is to ensure that upon output of the XML declaration, its attributes are forced to be in the correct order.
Officially, an XML declaration requires its attributes to be in the order: version, encoding, and then standalone. See for instance: https://xmlwriter.net/xml_guide/xml_declaration.shtml. Unfortunately, jtm seems to store all attributes in a data structure that does not preserve order, which is perfectly all right for any regular element's attributes.
A simple fix is to ensure that upon output of the XML declaration, its attributes are forced to be in the correct order.