Kramdown generating double alt attributes

#1

I just noticed that Kramdown generates double alt attributes (one is empty) in the HTML output (both developer server and build).

My test.md file:

![Alt text](/path/to/file.jpg "Title text")

and the output:

<p><img alt="Alt text" title="Title text" alt="" width="630" height="420" src="../path/to/file.jpg" /></p>

When I switch my config to Redcarpet then output is fine. Anybody can confirm that? I’m using:

middleman (3.3.3)
middleman-blog (3.5.3)
kramdown (1.3.3)
redcarpet (3.1.2)

I can provide detailed config and gemlist if anybody is interested.