nested_brace_in_variable.yaml:10:3: In project 'sample-project'
    - project:
      ^
nested_brace_in_variable.yaml:5:3: In job template 'sample-job'
    - job-template:
      ^
nested_brace_in_variable.yaml:8:15: While formatting string '{ {x} }': unexpected '{' in field name
        - shell: '{ {x} }'
                  ^
