What is U+0E46 THAI CHARACTER MAIYAMOK?

[James Kass via Unicode]

Asmus Freytag wrote,

> Any text editor that has the ability to handle
> slightly more complex input scenarios could be
> programmed to convert SP to NBSP before MAIYAMOK.

Yes.  If I were developing a Thai text editor it would also globally
replace any instances of SPACE + MAIYAMOK with NBSP + MAIYAMOK upon
File-Save automatically.  (To handle updating older files and
copy-pasting text from external sources.)