Fix some code inspection complaints

web/pgadmin/utils/driver/psycopg2/__init__.py

@@ -1181,7 +1181,7 @@ Failed to reset the connection to the server due to following error:
                 pos = 0
                 for col in self.column_info:
                     col['pos'] = pos
-                    pos = pos + 1
+                    pos += 1
 
             self.row_count = cur.rowcount
 

web/pgadmin/utils/sqlautocomplete/function_metadata.py

@@ -90,7 +90,7 @@ def parse_typed_field_list(tokens):
     #   " ( [ [ argmode ] [ argname ] argtype
     #               [ { DEFAULT | = } default_expr ] [, ...] ] )"
 
-    mode_names = set(('IN', 'OUT', 'INOUT', 'VARIADIC'))
+    mode_names = {'IN', 'OUT', 'INOUT', 'VARIADIC'}
     parse_state = 'type'
     parens = 0
     field = TypedFieldMetadata()