bug#56237: 29.0.50; delete-forward-char fails to delete character

[Visuwesh <visuweshm@gmail.com>]

[ஞாயிறு ஜூன் 26, 2022] Eli Zaretskii wrote:

>> From: visuweshm@gmail.com
>> Date: Sun, 26 Jun 2022 21:37:07 +0530
>> 
>> delete-forward-char fails to delete if the point is between two composed
>> characters.  To demonstrate,
>> 
>>         1. emacs -Q
>>         2. Yank "ரு போ" to the *scratch* buffer
>>         3. Place the cursor on the space character and say <Delete>
>> 
>> Observe how delete-forward-char does nothing.
>
> This is a feature (new with Emacs 29): delete-forward-char deletes
> entire grapheme clusters.  Use C-d if you want to delete individual
> codepoints inside a grapheme cluster.

I'm not sure how this defeats my expectation though?  I want the SPC to
be deleted and it does it do it when the buffer contains "b b" with the
point over SPC but it fails to do so when the buffer contains "ரு b"
instead.  I was under the impression that I could safely rebind C-d to
delete-forward-char.