Fix `count` method return value.
Return number represented as integer instead of string.
Fixes #4067.
Whitespace fix.
IDE's...
Fix indents.
Merge pull request #4070 from Feld0/4.1

Fix #4067: Acceptance validation not boolean true
Add space between type-casting operator and return value.
Merge pull request #4069 from Andreyco/4.1

Fix `count` method return value. #4.1
Make exception handler comply with HttpKernelInterface

- Don't send response in handleException to comply with HttpKernelInterface
- Added handleUncaughtException which also sends the response
Update Mailer.php

added missing class property
Merge pull request #4075 from janschoenherr/patch-1

Update Mailer.php
Merge pull request #4073 from alprs/fix/exhandler-httpkernel

Make exception handler comply with HttpKernelInterface