tests_ruby::vertical_ruby_is_upright_to_the_right_of_the_column
checked that no reading glyph is more than 1 pt wider than tall. With
craft-fonts in the build, the kana come from Shippori Mincho, whose か
is 8.24 pt wide and 7.22 pt tall at 10 pt. The test failed on that
glyph although it stands upright. FreeBSD CI, which builds with
craft-fonts at a71c20e3, fails it on every branch since 14f804cd. It
also fails on Windows with that ref or an older craft-fonts checkout.
The test now compares each reading glyph's ink with its own outline at
10 pt. The same width and height mean the glyph is upright; a swapped
width and height mean it lies on its side. It also requires one
reading glyph whose outline is not square.
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