---input---
int main()
{
foo:
  goto foo;
}

---tokens---
'int'         Keyword.Type
' '           Text
'main'        Name.Function
'('           Punctuation
')'           Punctuation
'\n'          Text

'{'           Punctuation
'\n'          Text

'foo'         Name.Label
':'           Punctuation
'\n'          Text

'  '          Text
'goto'        Keyword
' '           Text
'foo'         Name
';'           Punctuation
'\n'          Text

'}'           Punctuation
'\n'          Text
