This file provides a mapping for the standard TeX input conventions to Unicode. While not perfect—this kind of
    mapping can run into issues if you are remapping alphabetic characters in a context where there might be case
    manipulation (e.g., if a| maps to ᾳ, does A| map to ΑΙ or Αι? the former is correct if we're in an all-caps
    context and the letter if it's title-cased. And for added complications, some fonts would render it with an
    iota subscript ᾼ. On the other hand, this allows for some clever things to happen like, within a program listing
    we could easily replace every instance of <= with ≤ and no active characters are necessary for shortcuts like
    ~ for non-breaking spaces.
`	‘
``	“
'	’
''	”
--	–
---	—
!`	¡
?`	¿
~	\u{a0}