---input---
f"He said his name is {name!r}."

---tokens---
'f'           Literal.String.Affix
'"'           Literal.String.Double
'He said his name is ' Literal.String.Double
'{'           Literal.String.Interpol
'name'        Name
'!r}'         Literal.String.Interpol
'.'           Literal.String.Double
'"'           Literal.String.Double
'\n'          Text.Whitespace
