Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: current development main branch
• OS Version: MacOS 12.5.1

Steps to Reproduce:

1. make sure setting task.saveBeforeRun is set to prompt
2. save all editors
3. run a task
4. observe that the editor asks whether to save all editors

When no editor is dirty, it is disconcerting when trying to run a task asks me whether I should save all editors – I need to stop and think what is unsaved and whether I should save it. This can be avoided if the code checks that any editor is dirty before asking.

PR submitted: #159318