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To avoid "SpacingAfterParams" error with PHPCS Symfony2 coding standard

Hello,
I added two blank lines in comments two avoid the following error with PHPCS Symfony2 coding standard :
Error Code: SpacingAfterParams
Error Description: Last parameter comment requires a blank new line after it.
Merge pull request #730 from NicolasN/patch-1

To avoid "SpacingAfterParams" error with PHPCS Symfony2 coding standard
Add info tag around ATTENTION
Merge pull request #728 from armetiz/patch-1

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Update working-with-associations.rst

Always use the constant for sorting. If you use 'asc' it will not work.
Merge pull request #732 from trsteel88/patch-1

Update working-with-associations.rst