djot-0.1.0.0: test/spans.test

```
This is a [test of
*color*]{.blue}.
.
<p>This is a <span class="blue">test of
<strong>color</strong></span>.</p>
```

```
not a [span] {#id}.
.
<p>not a [span] .</p>
```

```
[nested [span]{.blue}]{#ident}
.
<p><span id="ident">nested <span class="blue">span</span></span></p>
```