Fix typos in code

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3
| Fixed tickets | 

PS 1: As so far I used only yaml files for services not sure if the changes to XML and PHP code blocks are correct

PS 2: Maybe I configured something wrong or something like that (or you could point me in the right direction for more information), but I don't think the terminate listener will work. In my opinion when command is exited with exception the exit code should be more than zero, but on `ConsoleTerminateEvent` and even on `ConsoleExceptionEvent` the exit code is `0`