SplitWords incorrectly suggests misspelled word should be split

**Describe the bug**
When I typo "occurred" as "occured", harper suggests writing "occur ed" instead.

**To Reproduce**
Steps to reproduce the behavior:
1. Type "occured"

**Expected behavior**
Harper should suggest "occurred" as a spelling correction

**Screenshots**

**Platform**
Neovim

**Additional context**
There may be other cases where this is causing issues

Start by reproducing the "occured" case in the Neovim integration and trace the SplitWords suggestion. The work is done when the typo suggests "occurred" as a spelling correction instead of splitting it into "occur ed", with other affected cases checked as well.

Written by the indexing model from the issue text.