When complaining about automated fields, output specifically which fields for which entries are causing the problem

[balupton]

As the comparison diff is useless...

Example problem: #307 (comment)

PR welcome for whoever wants to take this.

The current code for it is at https://github.com/bevry/staticsitegenerators-list/blob/dc2944a066f2d144dfc0a06b12233090ea149f87/test.js#L104-L106

Perhaps, we just need a better diffing algorithm, that just lists the keys. Could also be a key sorting issue, which https://github.com/bevry/sortobject could fix, if sorting is the issue.