---input---
f'{i}:{d[i]}'

---tokens---
'f'           Literal.String.Affix
"'"           Literal.String.Single
'{'           Literal.String.Interpol
'i'           Name
'}'           Literal.String.Interpol
':'           Literal.String.Single
'{'           Literal.String.Interpol
'd'           Name
'['           Punctuation
'i'           Name
']'           Punctuation
'}'           Literal.String.Interpol
"'"           Literal.String.Single
'\n'          Text.Whitespace