Update gabledroofbug.test.js

Author: Beakerboy

test/gabledroofbug.test.js

@@ -8,7 +8,7 @@ import { Building } from '../src/building.js';
 import { BuildingShapeUtils } from '../src/extras/BuildingShapeUtils.js';
 import { TextEncoder } from 'node:util';
 
-const data = `
+const data = `<?xml version='1.0' encoding='UTF-8'?>
 <osm version="0.6" generator="openstreetmap-cgimap 2.0.1 (2514279 spike-07.openstreetmap.org)" copyright="OpenStreetMap and contributors" attribution="http://www.openstreetmap.org/copyright" license="http://opendatacommons.org/licenses/odbl/1-0/">
 <node id="8091790599" visible="true" version="2" changeset="153088398" timestamp="2024-06-23T22:54:13Z" user="canavan" uid="2603792" lat="50.9208920" lon="7.1707447"/>
 <node id="8091790600" visible="true" version="2" changeset="153088398" timestamp="2024-06-23T22:54:13Z" user="canavan" uid="2603792" lat="50.9208175" lon="7.1706533"/>