[svg2xml] Add tests to valid issue 24 (of upstream repo)

Author: tbouffard

src/test/java/com/mxgraph/svg2xml/Svg2XmlTest.java

@@ -78,4 +78,11 @@ void convertToXml_files_from_two_folders_without_subfolders_files_given_ordered_
         );
     }
 
-}
+    @Test
+    void issue_upstream_24() {
+        Svg2Xml svg2Xml = newSvg2Xml();
+        File destPath = destinationFolder("upstream_issue_24");
+        svg2Xml.convertToXml(svgSourceFiles("upstream-issue-24/entry.svg"), destPath);
+    }
+
+}