…AS_STRINGS (GuilhemN)This PR was merged into the 3.3 branch.Discussion----------[Yaml] Suggest using quotes instead of Yaml::PARSE_KEYS_AS_STRINGS| Q             | A| ------------- | ---| Branch?       | 3.3| Bug fix?      | no| New feature?  | no <!-- don't forget updating src/**/CHANGELOG.md files -->| BC breaks?    | no| Deprecations? | no <!-- don't forget updating UPGRADE-*.md files -->| Tests pass?   | yes| Fixed tickets | #... <!-- #-prefixed issue number(s), if any -->| License       | MIT| Doc PR        |https://github.com/symfony/symfony/pull/22948/files#r126940623<!--- Bug fixes must be submitted against the lowest branch where they apply  (lowest branches are regularly merged to upper ones so they get the fixes too).- Features and deprecations must be submitted against the 3.4,  legacy code removals go to the master branch.- Please fill in this template according to the PR you're about to submit.- Replace this comment by a description of what your PR is solving.-->Commits-------9fd425e Suggest using quotes instead of Yaml::PARSE_KEYS_AS_STRINGS