Fixed syntax error in 'exec' command handler (#13360)
Fixed syntax error in 'exec' command handler (#13360)

The `startswith` method accepts a tuple as a first argument, without a tuple the following error appears:

```
TypeError: slice indices must be integers or None or have an __index__ method
```
mvaled/sentry,mvaled/sentry,mvaled/sentry,mvaled/sentry,mvaled/sentry,beeftornado/sentry,beeftornado/sentry,beeftornado/sentry,mvaled/sentry