docs: small fixes for doctor-data instructions

[vaeng]

Suggestions by @clechasseur

[siebenschlaefer]

If you guys really want this I'll approve.
But I like the previous version more. The "elements" of an enum are called enumerators, enum is the type itself.

[vaeng]

@siebenschlaefer
Here is @clechasseur original reasoning:

In the first task, the text mentions an "enumerator of type System". I think the use of the term "enum" (or perhaps "enumeration") would be better, because "enumerator" is used in many languages to mean something quite different from a C++ enum.

I might go the middle way by inserting a short "reminder" about the naming convention of enums in C++ and reverting it to the original state. What do you think?

[vaeng]

Needs one more substitution: #742

[clechasseur]

Here is a more complete excerpt:

The third argument comes from a `star_map` namespace.
It is an enumerator of type `System`.
You even got one of the enumerations: `BetaHydri`.

The second sentence seems to refer to the type itself. That's why I suggested using enum instead of enumerator.

[siebenschlaefer]

I don't object to this change. I understand that these concepts don't target language lawyers and that it might sense to use terms that are easier to understand than what is used in the standard.
I just wanted to give the C++ perspective where "enumerator" is the correct term (see [dcl.enum] in the current draft of the standard.

[clechasseur]

@siebenschlaefer After a careful reading of your comments and the provided link, I believe that the following terms should be used

• enumeration: refers to the type (in this case, System)
• enumerator: refers to an enum variant (in this case, BetaHydri)

I would therefore propose the following rephrasing, which more closely matches the standard (emphasis mine):

The third argument comes from a star_map namespace.
It is an enumeration type named System.
You even got one of the enumerators: BetaHydri.

As an aside, I didn't know that the term enumerator was used in the C++ standard to refer to an enum variant. Because of that, I thought using enumerator was misleading to people coming from other languages. I do in fact like to use proper C++ terminology when possible. 🙂

[vaeng]

Also add clarification to the garbled data: https://forum.exercism.org/t/corruption-in-the-c-track-repo/9088/6