CI: Action to assign issues fails when quotes are present
So, this is a little weird. Apparently I left such a bad comment on an issue, it failed CI 😄. 

I'm not sure how it got triggered, but looks like it's from a recently added workflow. The CI error has the contents of my comment, and I got an email that looks like this:

<details>
<summary> Notification email </summary>

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Run failed for master (6d11aa8)

Repository: pandas-dev/pandas
Workflow: Assign
Duration: 16.0 seconds
Finished: 2019-11-21 05:41:26 UTC

[View results](https://github.com/pandas-dev/pandas/commit/6d11aa89fc06ebc55519507f6652dcfcba35a302/checks)

Jobs:
[cb4db6dd-e658-55b7-b337-8761517bc1a3](https://github.com/pandas-dev/pandas/runs/313172123) failed (1 annotation)
—
You are receiving this because this workflow ran on your branch.
Manage your GitHub Actions notifications here.

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</details>

* [CI failure](https://github.com/pandas-dev/pandas/runs/313172123) - [Raw log](https://pipelines.actions.githubusercontent.com/xZyE9jtmkxWlfCAbyu1SHPJOlsa2huNFYcxohSTomy6EbdNZT9/_apis/pipelines/1/runs/857/signedlogcontent/3?urlExpires=2019-11-21T06%3A00%3A03.3232502Z&urlSigningMethod=HMACV1&urlSignature=vlq2JBJLcoJ3pFQnugH8M9AcGnopXrvuooUOaeU2eAA%3D)
* [The comment](https://github.com/pandas-dev/pandas/issues/14177)

Looks like this might be related to #29648, @datapythonista?