go_to_line: Show position relative to current excerpt in a multi-buffer (#31947)

Closes #31515

This PR explicitly leaves the behavior of go to line unspecified with
multi-buffer.

Release Notes:

- Fixed wrong line number being shown in the status bar when in
multi-buffer.
2bb8aa2f73Piotr Osiewicz committed on 6/3/2025, 7:41:45 AM· committed by GitHubparentbeeb42d
1 file changedLine totals unavailable