QTI 2.1: in text entry interaction trim insecable spaces with regular whitespaces

The equals method used for text entry interactions trims already the whitespaces but not other spaces like the insecable space (ASCII 160). It's an issue as the browsers trim already whitespaces but, in TinyMCE, if someone edit directly the gap text, in certain cases browsers add an insecable space (and invisible) at the end of the word. These insecables are after not trimmed, in browsers or in QTIWorks.