bug#77998: 30.0.50; thai-pattachote input method is missing characters?

[Robert Nikander]

Hi, 

I've been learning how to read Thai. I tried the input method 
`thai-pattachote`. I'm a beginner so not 100% sure about this, but it seems to 
be missing the character ฉ (THAI CHARACTER CHO CHING). Is that a bug? An input 
method should have all the characters in the alphabet, no?

When you do `describe-input-method` it shows you a keyboard, like this:

+----------------------------------------------------------------+
 | = + | ๒ " | ๓ / | ๔ , | ๕ ? | ู ุ | ๗ _ | ๘ . | ๙ ( | ๐ ) | ๑ - | ๖ % | ฃ ฅ |
+----------------------------------------------------------------+
   | ็ ๊ | ต ฤ | ย ๆ | อ ญ | ร ษ | ่ ึ | ด ฝ | ม ซ | ว ถ | แ ฒ | ใ ฯ | ฒ ฦ |
  +------------------------------------------------------------+
    | ้ ๋ | ท ธ | ง ำ | ก ณ | ั ์ | ี ื | า ผ | น ช | เ โ | ไ ฆ | ข ฑ | ฺ ํ |
   +-----------------------------------------------------------+
      | บ ฎ | ป ฎ | ล ฐ | ห ภ | ิ ั | ค ศ | ส ฮ | ะ ฟ | จ ฒ | พ ฬ |
     +-------------------------------------------------+

The character is not there. There may be more missing characters. This is just 
the first one I hit as I’m working through the alphabet. 

Rob


In GNU Emacs 30.0.50 (build 1, x86_64-apple-darwin18.7.0, NS
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