Symfony version(s) affected: 4.4.0, 5.0.0

Description

How to reproduce

1. Create a new project:

composer create-project symfony/skeleton lint_bug

2. Add config line to config/packages/framework.yaml

    ide: phpstorm

3. run command (bin/console lint:container)

Expected outcome:

Command completes successfully with no output.

Actual outcome:

Possible Solution
Not yet (but will provide info/ PR if I get a clear idea!)

However, this is to do with the parameter value containing a raw % character, which is then processed as if there is an embedded parameter within the value.