> we have a more modern implementation in the next beta
I tested the following with various flavors:
$
x\mathstrut_{3} x_{3}
x^3 x\mathstrut^3
x^\circ x\mathstrut^\circ
20\mathstrut^\circ 20^\circ
$
Flavors that I tried:
2014.03.27 MkIV
2014.02.14 MkIV
2013.06.07 MkII (from latest beta)
pdfTeX 1.40.14 (from Debian TL 2013)
(wrapping in \(start|stop)text or ending with \bye, as appropriate).
My observations:
The MkII and pdftex subscripts look too high. I know that's
sacreligious, since it is what Knuth must have intended, and I am
surprised that I didn't notice it before.
The 2014.02.14 MkIV subscript with the strut looks too low, although the
x^3 with the strut looks reasonable, or is maybe just slightly too high.
The x^\circ looks fine. The x\mathstrut^\circ is too high. But the
20\mathstrut^\circ looks right (and looks too low without the strut).
In 2014.03.27 MkIV, the subscript- and subscript heights are unchanged
by the strut. The subscript heights look right. The superscript
heights all look okay, except for the 20\mathstrut^\circ, which is too
low (same height as without the strut). In earlier versions, one could
raise the \circ using a \mathstrut, but that no longer has an effect.
The other change, and maybe I am hallucinating this one, is that the
horizontal spacing between the x and the 3 is now slightly different
with and without the strut: It is tighter with the strut. I think it
looks better without the strut, but am not sure.
So, overall I think it has improved. I also wonder:
1. about the right horizontal spacing (how tight it should be)
2. how to raise the \circ in 20^\circ
-Sanjoy
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