File erroneously treated as ibm420_rtl encoding

[mcandre]

I have a UTF-8 file that editorconfig-cli is mistakenly reporting as a non-UTF-8 file:

https://github.com/mcandre/toys/blob/ca0f58ab2482c5ad3b647b53a4df60c10ab167bf/jvm/java/yubnub/src/main/java/us/yellosoft/yubnub/package-info.java