Change setException to setError

[Landerstraeten]

#SymfonyConHackDay2018

[kunicmarko20]

The type hint and the use statement should also change since the name is different:

https://github.com/symfony/console/blob/master/Event/ConsoleErrorEvent.php

it is ConsoleErrorEvent and not ConsoleExceptionEvent.

[Landerstraeten]

Thank you @kunicmarko20. After validating my own pr I saw:

• The code example for ConsoleExceptionEvent is correct in 3.4
• The is no code example for ConsoleErrorEvent since it's an improved version of the ConsoleEvents::EXCEPTION event
• The class ConsoleExceptionEvent does not exist anymore in 4.1
• The code example for ConsoleErrorEvent is wrong for 4.1. Fixed in this PR
• The code example for ConsoleErrorEvent is wrong for 4.2. But should be fixed if 4.1 is merged into 4.2
• The code example for ConsoleErrorEvent is wrong for 4.3. But should be fixed if 4.1 is merged into 4.3

[kunicmarko20]

This (method name, import, and typehint) should probably be changed for 3.4 and up since the ConsoleExceptionEvent is deprecated on 3.4. Let's wait for the docs team and see what they say.

[Landerstraeten]

@javiereguiluz what do you suggest?

[stof]

The 3.4 doc should indeed be updated to showcase the non-deprecated version of it.

[javiereguiluz]

@Landerstraeten thanks for improving 3.4 code and fixing the other branches code (we'll do that when merging this into 4.1 and higher). Also, congrats on your first Symfony dDocs contribution!