---input---
{:alice {:likes :bob} :bob {:likes :carol} :carol {:likes :alice}}

---tokens---
'{'           Punctuation
':alice'      Name.Constant
' '           Text.Whitespace
'{'           Punctuation
':likes'      Name.Constant
' '           Text.Whitespace
':bob'        Name.Constant
'}'           Punctuation
' '           Text.Whitespace
':bob'        Name.Constant
' '           Text.Whitespace
'{'           Punctuation
':likes'      Name.Constant
' '           Text.Whitespace
':carol'      Name.Constant
'}'           Punctuation
' '           Text.Whitespace
':carol'      Name.Constant
' '           Text.Whitespace
'{'           Punctuation
':likes'      Name.Constant
' '           Text.Whitespace
':alice'      Name.Constant
'}'           Punctuation
'}'           Punctuation
'\n'          Text.Whitespace