Repeted XML declaration in MarcXML folder export

[lpugin]

When exporting records to MarcXML from a folder, an XML declaration <?xml version="1.0" encoding="UTF-8"?> is inserted between every record. This is the case for works but likely also for other resources.

[HirschSt]

Yes, for sources too:

This page contains the following errors:
error on line 4 at column 6: XML declaration allowed only at the start of the document
Below is a rendering of the page up to the first error.