Update nettest.py

tests/pytest/client/nettest.py

@@ -46,6 +46,7 @@ class TDTestCase:
         except Exception as result3:
             if result3 ==1:
                 tdLog.exit('the shell"taos -n fqdn" is wrong')
+                
 
     
     def stop(self):
@@ -55,4 +56,4 @@ class TDTestCase:
 
 
 tdCases.addWindows(__file__, TDTestCase())
-tdCases.addLinux(__file__, TDTestCase())
\ No newline at end of file
+tdCases.addLinux(__file__, TDTestCase())