This test checks block level letter-spacing on justified blocks.

Next block has no letter-spacing property: Default space between characters is defined to be 0pt, i.e., glyph-areas stacked with no extra space between the allocation-rectangles of the glyph-areas. Next block has letter-spacing="normal": Default space between characters is defined to be 0pt, i.e., glyph-areas stacked with no extra space between the allocation-rectangles of the glyph-areas. Next block has letter-spacing="0pt": Default space between characters is defined to be 0pt, i.e., glyph-areas stacked with no extra space between the allocation-rectangles of the glyph-areas. Next block has letter-spacing="2pt": Default space between characters is defined to be 0pt, i.e., glyph-areas stacked with no extra space between the allocation-rectangles of the glyph-areas. Next block has letter-spacing.optimum="2pt" letter-spacing.minimum="0pt" letter-spacing.maximum="4pt": Default space between characters is defined to be 0pt, i.e., glyph-areas stacked with no extra space between the allocation-rectangles of the glyph-areas.