CTRL+backspace stops before and after underscores now

The bug

In previous versions, the CTRL-navigation while typing (arrow keys, backspace, delete) to move the cursor a full word did not consider underscores as word breaks. Now, it does. This doesn’t match the behavior of most other text editing applications.

How to reproduce

1. Type /summon zombie_villager

2. Press CTRL-backspace

Expected behavior

It should revert to /summon

Observed behavior

It reverts to /summon zombie_

Notes

It’s unclear exactly when this changed, or which other characters are affected, if any.