It should pretty print html element compound tag names
<h{{header_number}}></h{{header_number}}>
<{{header_type}}-header></{{header_type}}-header>

It should print compound names on a single line, even if long
printWidth: 1
<h{{header_number | round}} ></h{{header_number | round }}>

It should print compound names with attributes as it would
printWidth: 1
<h{{ header_number | round }} attr=value disabled></h{{ header_number | round }}>