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Vim has modeline[0]. Is that what you meant?

[0] http://vimdoc.sourceforge.net/htmldoc/options.html#%27modeli...

And the Emacs equivalent, file-local variables[0]. However, these are editor-specific, as far as I'm aware, although Python was able to extract the commonalities between them to support file encoding in PEP 0263[1].

[0] http://www.gnu.org/software/emacs/manual/html_node/emacs/Spe...

[1] https://www.python.org/dev/peps/pep-0263/

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