Fix bad Tag name in error message

[lemoinem]

Was listener instead of subscriber.

[lemoinem]

I'm sorry, did I miss something regarding this PR?

[lemoinem]

This PR seems simple enough...

@schmittjoh I understand this is far from critical, but some sort of acknowledgment would be nice. Just to be sure it doesn't slip though the cracks...

[lemoinem]

@schmittjoh It's been almost one and a half year... Any news regarding this?

[goetas]

Hi, sorry for the terribly long feedback loop.

Do you mind adding tests for this?

[lemoinem]

You really want a test for that? It's just a typo or a copy/paste issue in an error message...

I don't even know how I should test a compiler pass.

How about a compromise: If you can provide a basic test case class for the compiler pass to test its basic behavior, I will add a test case for the error message?

[goetas]

alright, let's be pragmatic :)

An example on how to test compiler passes https://github.com/symfony/symfony/blob/master/src/Symfony/Component/DependencyInjection/Tests/Compiler/RemoveUnusedDefinitionsPassTest.php

[lemoinem]

Thanks for the reference! And for the merge.

I keep my offer on the table. If you ever make available a basic test for the CP, poke me and I will do my best to provide a PR with the test for this error message. But having a test only for this change, seems useless and (in the context of the PR) overkill. Still, I'm glad we could discuss this.