@jmclaus What do you think about this construction? Will it be better to use following code instead?
```html
<ul role="menubar" id="calculator_input_help" class="help">
    <li role="menuitem" tabindex="0">${_("Suffixes:")} %kMGTcmunp</li>
    <li role="menuitem" tabindex="0">${_("Operations:")} ^ * / + - ()</li>
    <li role="menuitem" tabindex="0">${_("Functions:")} sin, cos, tan, sqrt, log10, log2, ln, arccos, arcsin, arctan, abs </li>
    <li role="menuitem" tabindex="0">${_("Constants")} e, pi</li>
</ul>
```