---input---
<button aria-label="Submit">Submit</button>

---tokens---
'<'           Punctuation
'button'      Name.Tag
' '           Text.Whitespace
'aria-label'  Name.Attribute
'='           Operator
'"Submit"'    Literal.String
'>'           Punctuation
'Submit'      Name.Other
'</'          Punctuation
'button'      Name.Tag
'>'           Punctuation
'\n'          Text.Whitespace