All of the editors on the Binding: Value Converters page throw errors

I'm on Firefox 65.0.1 (64-bit).

Here's a snippet of the first one but some of them throw different errors.


Start at the Binding: Value Converters documentation page and reproduce the editor errors in Firefox 65.0.1, comparing the different failures shown in the issue and its screenshot. Done means the page's editors no longer throw errors.

Written by the indexing model from the issue text.