minor #1168 Changed Doctrine page to use utf8mb4 as sample (DHager)
minor #1168 Changed Doctrine page to use utf8mb4 as sample (DHager)

This PR was merged into the 1.2 branch.

Discussion
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Changed Doctrine page to use utf8mb4 as sample

MySQL's `utf8` character set is a little broken, and does not cover 4-byte UTF-8 characters. In most cases it will quietly truncate the string whenever it sees one, saving incomplete text data.

In  5.5.3 they introduced `utf8mb4` to fix this inconsistency, and given that it's been 5 years, it's probably safe to encourage people to use it. If their MySQL installation is older, it should be easy for them to find the distinctive string and change it back to `utf8`, and for a new project.

Additional details can be found in the equivalent [pull-request for Symfony-2](https://github.com/symfony/symfony-docs/pull/5100).

Commits
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a20f8f6 Changed Doctrine page to use utf8mb4 as sample

arduanov/Silex,romainneutron/Silex,mathroc/Silex,RayRutjes/Silex,mmauri04/Silex,SanderKnape/Silex,silexphp/Silex,fabpot/Silex,romainneutron/Silex,mTorres/Silex,beealone/Silex,cesarmarinhorj/Silex,Xephi/Silex,arduanov/Silex,gencer/Silex,plotek/Silex,SanderKnape/Silex,romainneutron/Silex,beealone/Silex,cgsmith/Silex,mathroc/Silex,jdreesen/Silex,Xephi/Silex,fabpot/Silex,cesarmarinhorj/Silex,mmauri04/Silex,jdreesen/Silex,fhinkel/Silex,lokhman/Silex,fhinkel/Silex,RayRutjes/Silex,mTorres/Silex,plotek/Silex,cgsmith/Silex,lokhman/Silex