---input---
f"My name is {name}, my age next year is {age+1}, my anniversary is {anniversary:%A, %B %d, %Y}."

---tokens---
'f'           Literal.String.Affix
'"'           Literal.String.Double
'My name is ' Literal.String.Double
'{'           Literal.String.Interpol
'name'        Name
'}'           Literal.String.Interpol
', my age next year is ' Literal.String.Double
'{'           Literal.String.Interpol
'age'         Name
'+'           Operator
'1'           Literal.Number.Integer
'}'           Literal.String.Interpol
', my anniversary is ' Literal.String.Double
'{'           Literal.String.Interpol
'anniversary' Name
':'           Literal.String.Interpol
'%A, %B %d, %Y' Literal.String.Double
'}'           Literal.String.Interpol
'.'           Literal.String.Double
'"'           Literal.String.Double
'\n'          Text.Whitespace
