Omit space before punctuation character

[rolyp]

I've removed the ::after pseudo-element spacing hack because it altered the scope of a selection to include the trailing space. We now insert spaces directly into the paragraph div between views. That's still sub-optimal because some text elements, like % (although apparently not units of measure), shouldn't by default be preceded by a space. We might need a more sophisticated single-spacing strategy that allows views to determine whether they require a preceding space.

See also:

• Spurious smart quotes in Graphik 300 #1306