Clarify formatting errors of history files upon validation

[MattiSG]

As seen in OpenTermsArchive/pga-declarations#235 and OpenTermsArchive/pga-declarations#236, when running validation on improperly formatted history files, the error message is impossible to understand:

 Uncaught error outside test suite:
     Uncaught TypeError: history[entry].sort is not a function

The validation should be clearer and yield a message similar to:

History file does not have the expected structure. Each term type should be declared within an array, rather than an object.

Similar to #832.

[gnaaruag]

hello there,
i'm relatively new to open source and think this is a good issue for me to get started. can i work on this/get this issue assigned?

[MattiSG]

Thanks @gnaaruag for offering your help! 😃
While this issue is good for newcomers to the codebase, it probably is not easy enough to get started with as a first contribution to open source. I removed the label.
Could you tell us where you spotted this issue and what led you to this repository? 🙂

[gnaaruag]

i was browsing the github education's section on open source repos one can contribute to and i really found this project to be interesting work. you do mention its probably not a good issue to get started with but can i still give it a shot?

[MattiSG]

Of course, you're welcome to try! 👍 However, we will unfortunately not be able at this time to provide proper guidance for a new contributor. You can find more information on #832 (comment).

Please also kindly note that we will not accept AI-generated pull requests.

[gnaaruag]

hey! thanks, ill spend a little while getting familial with the repo and then try to solve it. also do you guys have a discord server perchance?

[MattiSG]

We don't use Discord but have a Mattermost for contributors 🙂 Let's keep GitHub to discuss work on this issue so we have public traces!