image_tag helper -> empty alt atrribute is removed but required for a11y

[Xaviju]

Environment Info

Node version: v10.5.0

Hexo and Plugin version: hexo@3.7.1

Bug description

1. BUG description
   For screen readers, is required to add an empty alt attribute (alt="") on images that are only decorative. It allows users with disabilities to read the page and avoid only-visual information. If a screen reader finds an image tag without an alt attribute will read the filename.

2. The way to reproduce

<%- image_tag(gravatar(post.author.email), {
    alt: "",
    class: "post-author-image"
}) %>

generates a

<img src="image.png" class="post-author-image">

The expected behaviour would be

<img src="image.png" class="post-author-image" alt="">

Note If I add an empty string in the alt (alt=" ") it works as expected.

[stale]

This issue has been automatically marked as stale because lack of recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Xaviju]

Closing because it has been fixed