document `IUntitledTextResourceEditorInput` better
document `IUntitledTextResourceEditorInput` better

microsoft/vscode,eamodio/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,microsoft/vscode,eamodio/vscode,eamodio/vscode,eamodio/vscode,eamodio/vscode,microsoft/vscode,eamodio/vscode,microsoft/vscode,Microsoft/vscode,Microsoft/vscode,eamodio/vscode,Microsoft/vscode,Microsoft/vscode,microsoft/vscode,Microsoft/vscode,Microsoft/vscode,Microsoft/vscode,Microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,Microsoft/vscode,microsoft/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,eamodio/vscode,microsoft/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,Microsoft/vscode,Microsoft/vscode,Microsoft/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode