"\xAD" => {string => '-'},
"\x{200E}" => {string => '→'},
"\x{200F}" => {string => '←'},
- "\x{200B}" => {string => '␣'},
+ "\x{200B}" => {string => '␣'}, # nbsp: ~ in TeX
"\x{200C}" => {string => '|'}, # ISO-9995-7-081 lookalike (alt: ∣ ⊺ ⟙)
"\x{200D}" => {string => '⁀'}, # join (alt: ∤ |ͯ ⨝)
);