[HttpKernel] trim the leading backslash in the controller init#32541

fabpot merged 2 commits intosymfony:4.3symfony/symfony:4.3from

Simperfit:feature/trim-backslash-a-the-start-of-a-controllerSimperfit/symfony:feature/trim-backslash-a-the-start-of-a-controllerCopy head branch name to clipboard