Commit 7f35f8a9 for gh-14665 was unfortunately incomplete as it didn't
account for uppercase values. The run-off while loop should have used
`Character.toLowerCase` in the same way as the main while loop.
Fixes gh-15152
Commit 7f35f8a9 for gh-14665 was unfortunately incomplete as it didn't
account for uppercase values. The run-off while loop should have used
`Character.toLowerCase` in the same way as the main while loop.
Fixes gh-15152