Intent of editStack.ts ×1

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
- editor/ 4 tests
  - test/ 4 tests
    
    common/ 4 tests
    
    model/ 1 test
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/editor/test/common/model/editStack.test|title=EditStack issue #118041: unicode character undo bug|occurrence=1 Inherited editStack.test|title=EditStack issue #118041: unicode character undo bug|occurrence=1
    
    services/ 3 tests
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/editor/test/common/services/modelService.test|title=ModelService does not maintain undo for same resource and different content|occurrence=1 Inherited modelService.ts ×1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/editor/test/common/services/modelService.test|title=ModelService maintains undo for same resource and same content|occurrence=1 Inherited undoRedoService.ts ×2
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/editor/test/common/services/modelService.test|title=ModelService maintains version id and alternative version id for same resource and same content|occurrence=1 Inherited textModel.ts ×2