Test: set encoding to utf-8 in TestMetadata.test_file_path

src/Mod/Test/Metadata.py

@@ -111,7 +111,7 @@ class TestMetadata(unittest.TestCase):
     def test_file_path(self):
         # Issue 7112
         filename = os.path.join(tempfile.gettempdir(), b'H\xc3\xa5vard.xml'.decode("utf-8"))
-        xmlfile = open(filename, "w")
+        xmlfile = open(file=filename, mode="w", encoding="utf-8")
         xmlfile.write(r"""<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
 <package format="1" xmlns="https://wiki.freecad.org/Package_Metadata">
   <name>test</name>