Token:
| "TEXT"
| "START_TAG_NAME"
| "START_TAG_CLOSING"
| "START_TAG_SELF_CLOSING"
| "END_TAG_NAME"
| "ATTRIBUTE_NAME"
| "ATTRIBUTE_CLOSING"
| "ARGUMENT_NAME"
| "ARGUMENT_CLOSING"
| "ARGUMENT_TYPE"
| "ARGUMENT_STYLE"
| "CATEGORY_NAME"
| "CATEGORY_CLOSING"
| "OPTION_NAME"
| "QUOTED_OPTION_VALUE"
| "UNQUOTED_OPTION_VALUE"
| "OCTOTHORPE"
A token that can be read from a text.