What file formats did you have in mind exactly when you say "readable"?
You can, for example, export the issue history into a well readable PDF document with Better PDF Exporter, like this:
You can read more about this option and more here to see if it fits your needs.
If you prefer Excel, you can do the same in Excel, too.
(Please note that Better PDF Exporter is a paid and supported app and I'm part of the team developing it.)
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