When running the Efl.Canvas.Textblock style elementary_test and pressing TAB, the sample text disappears, because the font color is not recognized anymore due to the <TAB> character being appended to the previous "white" string.
TABS should be treated just like SPACES.
As documentation explains, the string passed to style_apply() is a key=value pairs separated by white spaces.
So I think what we currently doing is violating this information.
So I suggest changing the demo to get ride of \r \n \t (keep numbers/letters and whitespaces only) before applying the style.
I think most users will assume that \r \n and \t ARE whitespace characters:
https://en.wikipedia.org/wiki/Whitespace_character
So maybe we can change the implementation to allow these characters as separators too?
Bear in mind that this is not a high priority task.