Unexpected events for single updateWorkspaceFolders operation

[weinand]

testing #42195:

• workspace with 4 folders f1, f2, f3, f4
• code that swaps f2 with f3 (but removes and adds f4 unnecessarily):

  const folders = vscode.workspace.workspaceFolders;
  vscode.workspace.updateWorkspaceFolders(1, folders.length-1, folders[2], folders[1], folders[3]);

For this single operation I get these two events:
onDidChangeWorkspaceFolders: added: 0, removed: 3
onDidChangeWorkspaceFolders: added: 3, removed: 0

I would have expected to only receive a single event:
onDidChangeWorkspaceFolders: added: 2, removed: 2

(or even better a single changed event:
onDidChangeWorkspaceFolders: added: 0, removed: 0, changed: 2
)

Another case:
renaming a folder with this code:

        const folders = vscode.workspace.workspaceFolders;
        vscode.workspace.updateWorkspaceFolders(1, 1, { uri: folders[1].uri, name: folders[1].name + 'x' });

results in two events too.

[bpasero]

Yeah this is another issue similar to #42625 where all I have is a remove and add API, where I should change to have an API that allows for both things at once.

[joaomoreno]

I now see added 0 removed 0 for both examples. 👍