"E" and "I" symbols in istanbul HTML reports : <p>what do the "I" and "E" symbols with the black backgrounds signify in the HTML reports generated by the istanbul JS code coverage tool?</p>

<p><a href="https://i.stack.imgur.com/uw7xj.png" rel="noreferrer"><img src="https://i.stack.imgur.com/uw7xj.png" alt="enter image description here"></a></p>
