showdownjs/test/functional/makehtml/cases/issues/#429.multiline-base64-image-support.html

<p><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAIAAAA7ljmRAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAYSURBVBhXYwCC/2AAZYEoOAMs8Z+BgQEAXdcR7/Q1gssAAAAASUVORK5CYII=" alt="foo" /></p>
<p><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAIAAAA7ljmRAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAYSURBVBhXYwCC/2AAZYEoOAMs8Z+BgQEAXdcR7/Q1gssAAAAASUVORK5CYII=" alt="bar" /></p>