Summary

The DeleteToPreviousSubwordStart command deletes the end of the previous line when deleting an empty line. Similarly, DeleteToNextSubwordEnd deletes the start of the next line.

Description

This PR fixed the behavior of the DeleteToPreviousWordStart and DeleteToNextWordEnd commands, but did not address the corresponding subword commands (DeleteToPreviousSubwordStart and DeleteToNextSubwordEnd), whose behavior is now misaligned.

I have found this related issue, but it was automatically closed last year without being addressed.

Steps to reproduce:

1. Use DeleteToPreviousSubwordStart or DeleteToNextSubwordEnd on an empty line

Expected Behavior: the line is deleted and no other line is modified
Actual Behavior: the line is deleted and the end of the previous line (if using DeleteToPreviousSubwordStart) or the start of the next line (if using DeleteToNextSubwordEnd) is deleted

Zed Version and System Specs

Zed: v0.203.4 (Zed)
OS: Linux X11 ubuntu 22.04
Memory: 31 GiB
Architecture: x86_64
GPU: Intel(R) Graphics (RPL-P) || Intel open-source Mesa driver || Mesa 23.2.1-1ubuntu3.1~22.04.3