Evaluatable expression off by one in range computation

[isidorn]

Refs: #91268

1. Use the mock debug evaluatble expression API
2. Hover over some word
3. Notice how the range highlight in the editor is 1 character shorter than it should be. WHile the extracted result is correct

Upon looking at the mock debug implementation it seems like Mock debug incorectly returns a Range shorter by 1. And it seems like vscode properly shows this in the higlighted background, however the result extraction takes 1 character too much.

Contrast is not so strong but this picture shows the issue. y in funcitonlaity is not highlighted, while funcitonlaity is extracted as the result.

[connor4312]

I'm seeing that the EvaluatableExpression seems to take one character too much off the word. In the simple test case:

  vscode.languages.registerEvaluatableExpressionProvider('javascript', {
    provideEvaluatableExpression(document, position) {
      const word = document.getWordRangeAtPosition(position)
      return new vscode.EvaluatableExpression(word);
    },
  });

Hovering over the console in a console.log() correctly selects the word "console", but over DAP I see an evaluate request for console.

[weinand]

Great find (because of the weak contrast of the selection color I did not notice the selection being off-by-one).
Please note: the fix is both in VS Code and Mock Debug.