Fix BlockMap's handling of trailing empty excerpt updates with other edits

Co-Authored-By: Antonio Scandurra <me@as-cii.com>
Co-Authored-By: Nathan Sobo <nathan@zed.dev>
fc70c6d4fdMax Brunsfeld committed on 2/9/2022, 7:54:59 PMparentcbf59ff
4 files changedLine totals unavailable