Change Exportgedcoms open

gramps/plugins/export/exportgedcom.py

@@ -238,7 +238,7 @@ class GedcomWriter(UpdateCallback):
         """
 
         self.dirname = os.path.dirname (filename)
-        self.gedcom_file = open(filename, "w", encoding='utf-8')
+        with open(filename, "w", encoding='utf-8') as self.gedcom_file:
             self._header(filename)
             self._submitter()
             self._individuals()
@@ -248,7 +248,7 @@ class GedcomWriter(UpdateCallback):
             self._notes()
 
             self._writeln(0, "TRLR")
-        self.gedcom_file.close()
+
         return True
 
     def _writeln(self, level, token, textlines="", limit=72):