Finish implementing ProjectDiagnostics::open_excerpts

* Build workspace item views with a reference to the workspace
* Add randomized test for MultiBuffer::excerpted_buffers and fix a small bug

Co-Authored-By: Nathan Sobo <nathan@zed.dev>
ea263822faMax Brunsfeld committed on 1/7/2022, 5:59:27 PMparente5c520a
5 files changedLine totals unavailable