I apologize.
It is not hyphen symbol. It is unicode.
Everything is working!
2017-03-31 11:46 GMT+03:00 Kostirya :
Hello.
Two hyphens do not replaced on em—dash when dejavu,14pt
:-(
\starttext
1-2 11--22
\switchtobodyfont[dejavu,14pt]
1-2 11--22
\stoptext