Fix exception message for keyNames parameter to WikiPage::getAllSection

[Xymph]

While reviewing the exception/error handling situation this one jumped out just now. The single quotes meant that $keyNames was shown verbatim, not its value. Now the message clarifies which parameter has what unexpected value.

The exception type is also changed to the more specific and appropriate UnexpectedValueException.

[waldyrious]

Just a minor suggestion for the changelog entry. Also, the commit message exceeds the recommended guideline for commit message length and indeed GitHub cuts off the message at the 70th character: see 1876cdd. Could you shorten it a bit?

[Xymph]

Just a minor suggestion for the changelog entry. Also, the commit message exceeds the recommended guideline for commit message length and indeed GitHub cuts off the message at the 70th character: see 1876cdd. Could you shorten it a bit?

Done, but I realize I'm being a bit hasty on this PR. Please don't merge it yet, it can simmer a few hours, or until tomorrow.

[Xymph]

The backslash on the exception name specifies global namespace, something I'm not very familiar with yet. But I've come to understand this may better also be used on the 'new stdClass' added in #119. I hesitated to do that at the time.

However, because Wikimate itself doesn't define a namespace (yet?) there's no difference in practice. So it would be overkill to make a separate one-character PR for this. But before you hate me for sneaking that change into this PR 😆 I figured I better raise the topic first. Would you accept it in this case?

[waldyrious]

Done, but I realize I'm being a bit hasty on this PR. Please don't merge it yet, it can simmer a few hours, or until tomorrow.

Sure :)

The backslash on the exception name specifies global namespace

Ah, I did wonder if that could have been a typo of some sort! 😄

it would be overkill to make a separate one-character PR for this. But before you hate me for sneaking that change into this PR 😆 I figured I better raise the topic first. Would you accept it in this case?

Hahah, no worries :) I think you've been quite measured with the snuck-in changes ;) I agree that a one-character change, to adopt a syntax that is already being introduced in this PR, is quite reasonable.

[Xymph]

Done, but I realize I'm being a bit hasty on this PR. Please don't merge it yet, it can simmer a few hours, or until tomorrow.

Other than the linefeeds topic, this PR is now good to go.

[waldyrious]

LGTM!