---input---
f'{chr(65) = }'

---tokens---
'f'           Literal.String.Affix
"'"           Literal.String.Single
'{'           Literal.String.Interpol
'chr'         Name.Builtin
'('           Punctuation
'65'          Literal.Number.Integer
')'           Punctuation
' '           Text.Whitespace
'= }'         Literal.String.Interpol
"'"           Literal.String.Single
'\n'          Text.Whitespace