doc: Link to harfbuzz font feature format

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Florian Bruhin 2021-06-15 17:36:12 +02:00
parent 51f8b22dfa
commit 9fffe0d710

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from Ø. Fira Code Retina also includes other discretionary features known as
Stylistic Sets which have the tags :code:`ss01` through :code:`ss20`.
For the exact syntax to use for individual features, see the
:link:`Harfbuzz documentation
<https://harfbuzz.github.io/harfbuzz-hb-common.html#hb-feature-from-string>`.
Note that this code is indexed by PostScript name, and not the font
family. This allows you to define very precise feature settings; e.g. you can
disable a feature in the italic font but not in the regular font.