Follow-up Comment #16, bug #57506 (group groff): [comment #12 comment #12:] > afmtodit has a command-line switch to specify a value for "slant" > different from the .afm file's ItalicAngle. The passage of > afmtodit(1) quoted in comment #6 claims groff uses this value to > adjust diacritic placement, but I've been unable to prove this.
Deri has an alternative explanation in bug #63018: "As far as I can tell the
'slant' parameter does nothing for composite (e.g. a glyph plus an accent
glyph on top of each other) placement. What it does do is affect both italic
correction factors and the subscript correction, i.e. when a font switches
from roman to italic for example."
So afmtodit(1) might be misstating the purpose of the -a option.
Deri's explanation still doesn't explain (to me) why TBI's slant should be
more than double TI's. The corresponding glyphs in the two fonts have
different weights but the same shapes, so would seem to call for the same
corrections.
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