Small reproducing example:
``` static SOMETHING : usize = 4usize; ```
Expected behavior: recognize `4usize` as the number.
Actual behavior: the `4usize` doesn't get parsed correctly, and geany only marks `4us` as the number, apparently parsing `ize` as a different, stand-alone identifier.
As this is technically a bug in scintilla, I guess, I already [created a bug there](https://sourceforge.net/p/scintilla/bugs/1919/).