Intent of yaml.ts ×3

All 4 exact tests in this concept. Every test is marked by where it enters the hierarchy.

mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/ 4 tests
- base/ 4 tests
  - test/ 4 tests
    
    common/ 4 tests
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/base/test/common/yaml.test|title=YAML Parser Block sequences sequence of mappings|occurrence=1 Inherited yaml.test|title=YAML Parser Block sequences sequence of mappings|occurrence=1, yaml.test|title=YAML Parser Block sequences spec 2.4 - sequence of mappings (229Q)|occurrence=1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/base/test/common/yaml.test|title=YAML Parser Block sequences spec 2.4 - sequence of mappings (229Q)|occurrence=1 Inherited yaml.test|title=YAML Parser Block sequences sequence of mappings|occurrence=1, yaml.test|title=YAML Parser Block sequences spec 2.4 - sequence of mappings (229Q)|occurrence=1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/base/test/common/yaml.test|title=YAML Parser Old test suite nested block sequences (dash on next line)|occurrence=1 Inherited yaml.test|title=YAML Parser Old test suite nested block sequences (dash on next line)|occurrence=1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/base/test/common/yaml.test|title=YAML Parser Old test suite sequence of mappings with varying styles|occurrence=1 Inherited yaml.test|title=YAML Parser Old test suite sequence of mappings with varying styles|occurrence=1