[1288] a bit of cleanup: removed unnecessary escapes and an unsed variable.

src/bin/xfrout/xfrout.py.in

@@ -260,12 +260,12 @@ class XfroutSession():
         # We should eventually take into account the RR class here.
         # For now, we  hardcode a particular type (SQLite3-based), and only
         # consider that one.
-        datasrc_config = '{ \"database_file\": \"' + \
-            self._server.get_db_file() + '\"}'
+        datasrc_config = '{ "database_file": "' + \
+            self._server.get_db_file() + '"}'
         self._datasrc_client = self.ClientClass('sqlite3', datasrc_config)
         try:
             self._iterator = self._datasrc_client.get_iterator(zone_name)
-        except isc.datasrc.Error as error:
+        except isc.datasrc.Error:
             # If the current name server does not have authority for the
             # zone, xfrout can't serve for it, return rcode NOTAUTH.
             # Note: this exception can happen for other reasons.  We should

src/lib/python/isc/notify/notify_out.py

@@ -256,7 +256,7 @@ class NotifyOut:
         but not correct, it can't handle the delegation slaves, or the CNAME
         and DNAME logic.
         TODO. the function should be provided by one library.'''
-        datasrc_config = '{ \"database_file\": \"' + self._db_file + '\"}'
+        datasrc_config = '{ "database_file": "' + self._db_file + '"}'
         result, finder = DataSourceClient('sqlite3',
                                           datasrc_config).find_zone(zone_name)
         if result is not DataSourceClient.SUCCESS:
@@ -467,7 +467,7 @@ class NotifyOut:
         return msg, qid
 
     def _get_zone_soa(self, zone_name, zone_class):
-        datasrc_config = '{ \"database_file\": \"' + self._db_file + '\"}'
+        datasrc_config = '{ "database_file": "' + self._db_file + '"}'
         result, finder = DataSourceClient('sqlite3',
                                           datasrc_config).find_zone(zone_name)
         if result is not DataSourceClient.SUCCESS: