Switch whitespace queries to regex

[beckyjackson]

The report queries to catch annotation and label whitespace only look for a space character at the start or end of the string. This misses leading/trailing tabs and newlines, which can cause issues (DiseaseOntology/HumanDiseaseOntology#782).

This switches to a regex pattern to look for spaces, tabs, and newlines at the start or end of labels and other annotations.

[jamesaoverton]

I think \s+ is better than [ \t\r\n]+, as long as the regex is capturing line endings (sometimes called multiline mode).

[beckyjackson]

I tried this out with:

FILTER REGEX(str(?value), "\s+$")

And it seems like it returns some false positives. For example, this annotation contains new lines, but they are not at the start or end of the string:

Xref MGI.
OMIM mapping confirmed by DO. [SN].
Updating outdated UMLS CUI. 
Removing Caroli disease as a synonym as this is a distinct disease.

I would guess for labels, this is what we want to prevent, so that would be fine... but is it OK to have newlines in other annotations?

[jamesaoverton]

I didn't re-check this before I merged. Is this double-escaped \\s correct?

[beckyjackson]

Running it without the double escape results in an error, I'm not totally sure why, because the other ones (e.g., \t) don't require double escapes.