ttx(1) on Linux
The text edf7006c344c, as Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
tool for manipulating TrueType and OpenType fonts
Flags it lists
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-a -
-b -
-d -
-h -
-i -
-l -
-m -
-o -
-s -
-t -
-v -
-x -
-y