`TestRunner2`: do not use `#keysAndValuesCollect:`
...as semantics differ among smalltalk dialects. This is normally not a
problem until we use code that adds this as a "compatibility" method.
So to stay on a safe side, avoid using this method.
/* XPM */
static char *small_folder_yellow_grey_xpm[] = {
/* width height ncolors chars_per_pixel */
"20 16 6 1",
/* colors */
"a c black",
"b c white",
"c c #BEBE00",
"d c #C2C2C2",
"e c #818181",
"f c none",
/* pixels */
"ffffffffffffffffffff",
"ffffffffffffffffffff",
"ffffeeeeefffffffffff",
"fffedcdcdeffffffffff",
"ffedcdcdcdeeeeeeffff",
"ffebbbbbbbbbbbbeafff",
"ffebcdcdcdcdcdceafff",
"ffebdcdcdcdcdcdeafff",
"ffebcdcdcdcdcdceafff",
"ffebdcdcdcdcdcdeafff",
"ffebcdcdcdcdcdceafff",
"ffebdcdcdcdcdcdeafff",
"ffebcdcdcdcdcdceafff",
"ffeeeeeeeeeeeeeeafff",
"fffaaaaaaaaaaaaaafff",
"ffffffffffffffffffff",
};