bug#5226: Malayalam conjunct formation breaks down at the end of long words

[Praveen A]

Hi,

Many Malayalam conjuncts at the end of long words are broken down to
its basic forms.

Example 1: നക്ഷത്രാവശിഷ്ടങ്ങളും or
'\u0d28\u0d15\u0d4d\u0d37\u0d24\u0d4d\u0d30\u0d3e\u0d35\u0d36\u0d3f\u0d37\u0d4d\u0d1f\u0d19\u0d4d\u0d19\u0d33\u0d41\u0d02'
(ങ്ങ is broken into ങ ് ങ)
Example2: എനിയ്ക്കിഷ്ടായില്ല or
'\u0d0e\u0d28\u0d3f\u0d2f\u0d4d\u0d15\u0d4d\u0d15\u0d3f\u0d37\u0d4d\u0d1f\u0d3e\u0d2f\u0d3f\u0d32\u0d4d\u0d32'
(ല്ല is broken into ല ് ല)

To reproduce this bug: Copy the above example to a buffer and observe
the deference in rendering when a space is added in the middle of the
word.

This is tested with CVS version of emacs with most recent Indic rendering fixes.

- Praveen
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