DOMDocument::loadHTML() Tag template invalid in Entity PHP Warning

[salcode]

When a Gist is retrieve from GitHub and parsed a PHP warning is thrown

DOMDocument::loadHTML() Tag template invalid in Entity

Note: Once the Gist is loaded in the transient, this does not occur again.

Expected Behavior

No warning is thrown, when loading the HTML for the Gist.

Current Behavior

A warning is thrown, when loading the HTML for the Gist.

DOMDocument::loadHTML() Tag template invalid in Entity

Possible Solution

Set

libxml_use_internal_errors(true);

see #80

Steps to Reproduce (for bugs)

1. Enable PHP warnings
2. Add a Gist to a post (e.g. https://gist.github.com/salcode/10017553)
3. Save the post
4. View the post on the front-end

Note: This behavior does NOT occur on page reload, because the output is now stored in a transient. You'll need to delete the transient (prefix gist_html_) to cause the warning again.