Embedding .ipynb results in a gist with github spinner

[aishahsofea]

Describe the bug

When embedding a Jupyter notebook cell in the article, there is a github spinner/loader at the top of the gist.

To Reproduce

1. Create a Jupyter gist in github.
2. Use the following format to embed the gist in the article : {% gist https://gist.github.com/CristinaSolana/1885435 file=gistfile1.ipynb%}
3. Preview article

Expected behavior

The spinner disappears as the cell loads.

Screenshots

Desktop (please complete the following information):

• OS: Windows
• Browser: Chrome
• Version:

[citizen428]

@aishahsofea The gist you linked doesn't seem to include an IPython notebook. I used another one to reproduce this.

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[citizen428]

When reproducing this locally I see both XML parsing errors (from Python):

XML Parsing Error: junk after document element
Location: https://github-render.s3.amazonaws.com/prod/a9fb9417e574aad8…ignature=Xo5oi1Qxy%2Bl9gxMpdjk23P2fbxQ%3D&Expires=1591085775
Line Number 22, Column 1:

and

XML Parsing Error: not well-formed
Location: https://github-render.s3.amazonaws.com/prod/a9fb9417e574aad8…&Signature=D8y63RlI/tcdVrayWUuLRJZ5K3k%3D&Expires=1591085775
Line Number 1, Column 1: