---input---
f'{(lambda x: x*2)(3)}'

---tokens---
'f'           Literal.String.Affix
"'"           Literal.String.Single
'{'           Literal.String.Interpol
'('           Punctuation
'lambda'      Keyword
' '           Text.Whitespace
'x'           Name
':'           Punctuation
' '           Text.Whitespace
'x'           Name
'*'           Operator
'2'           Literal.Number.Integer
')'           Punctuation
'('           Punctuation
'3'           Literal.Number.Integer
')'           Punctuation
'}'           Literal.String.Interpol
"'"           Literal.String.Single
'\n'          Text.Whitespace
