…ool given (danepowell)

This PR was merged into the 5.4 branch.

Discussion
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[Console] trim(): Argument #1 () must be of type string, bool given

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | yes
| New feature?  |no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? |no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->
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If you run a Symfony Console application in Git Bash, ANSICON is not set out of the box and results in this (suppressed) error:
> trim(): Argument ($string) must be of type string, bool given

AFAICT, this method is only called from Application::run() and errors are suppressed. So users will never actually see that error. Still, it could have side effects and breaks downstream projects: box-project/box#990

Commits
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324b160 trim(): Argument #1 () must be of type string, bool given