Fix typos in code
Removed parameters from service
Change: ConsoleTerminateListener => ErrorLoggerListener
instructions for setting SYMFONY_ENV on Heroku for smooth deploys
minor #4422 Fix typos in code (ifdattic)

This PR was merged into the 2.3 branch.

Discussion
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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`

Commits
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2135b82 Change: ConsoleTerminateListener => ErrorLoggerListener
fc403b1 Removed parameters from service
d4ba3c0 Fix typos in code
capitalize section title as per feedback
remove first person as per feedback
[RFC] Clarification on formatting for bangs (!)

It seems to me that 
> Add a single space around operators

would mean using the practice on the bang operator as well; as discussed in [this thread](https://github.com/php-fig/fig-standards/issues/102), there is somewhat of a conflict--so this may not be the way to go. If the PSR could be amended, then this change would make sense.
Reverses statement about bang spacing and corresponding examples
Adds bullet addressing bang placement
Fixes wrong bullet character
Fixes spelling and formatting errors
Adds missing space before return statement
Changes operator spacing language
Incorporates @WouterJ 's suggestion for more realistic usage of bang
Fixes concat operator typo
feature #4457 [RFC] Clarification on formatting for bangs (!) (bryanagee)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #4457).

Discussion
----------

[RFC] Clarification on formatting for bangs (!)

It seems to me that
> Add a single space around operators

would mean using the practice on the bang operator as well; as discussed in [this thread](https://github.com/php-fig/fig-standards/issues/102), there is somewhat of a conflict--so this may not be the way to go. If the PSR could be amended, then this change would make sense.

Commits
-------

ee888c6 Fixes concat operator typo
33e76a5 Incorporates @WouterJ 's suggestion for more realistic usage of bang
837e895 Changes operator spacing language
835d5eb Adds missing space before return statement
3799bc0 Fixes spelling and formatting errors
30d19ab Fixes wrong bullet character
3212b6c Adds bullet addressing bang placement
95a1cc5 Reverses statement about bang spacing and corresponding examples
a68d3e5 [RFC] Clarification on formatting for bangs (!)
Missing attribute 'original'

I copy pasted the example messages.en.xliff provided. Running it on symfony 2.6 required me the attribute 'original'.
I added ' original="file.ext" ' as attribute for the file tag and it worked. However I am not shure about the proper parameter for this attribute.
bug #4594 Missing attribute 'original' (Marcelsj)

This PR was submitted for the 2.6 branch but it was merged into the 2.3 branch instead (closes #4594).

Discussion
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Missing attribute 'original'

I copy pasted the example messages.en.xliff provided. Running it on symfony 2.6 required me the attribute 'original'.
I added ' original="file.ext" ' as attribute for the file tag and it worked. However I am not shure about the proper parameter for this attribute.

Commits
-------

c0ef3e4 Missing attribute 'original'
feature #4591 Instructions for setting SYMFONY_ENV on Heroku (dzuelke)

This PR was merged into the 2.3 branch.

Discussion
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Instructions for setting SYMFONY_ENV on Heroku

Much smoother sailing with that step included :)

On a related note, I was going to add general advice on using `SYMFONY_ENV`, as it is currently very under-documented (just one aside mention at http://symfony.com/doc/current/cookbook/deployment/tools.html#c-update-your-vendors), but I wasn't sure where to do this. Maybe in `cookbook/configuration/environments.rst` and a few other places?

Commits
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576bbfb remove first person as per feedback
579fdd6 capitalize section title as per feedback
5f987ff instructions for setting SYMFONY_ENV on Heroku for smooth deploys