…n test data - followup to #2845
…o.get() doesn't guarantee to return null terminated C-string!)
…assertions failing (isascii_(ch)) in debug builds - ref #2829
… set_alpha. Updated tests, clamping is now used.
…y and multiply_opacity
…d at the multiplier, but rather at the result of the multiplier and alpha.
Helped me a lot when I needed to find a superfluous `-->` in a large `map.xml`.