Fix parsec example code

[kinow]

Had fixed the examples before while working on the setup.py #2834 PR, but removed it as it doesn't really belong there.

Instead submitting a separated PR. After fixing it, the test.py prints:

title = parsec torture test
[list values]
    [[integer lists]]
        foo = 1..3, 3, 3, 4, 4
        bar = 1..3, 3, 3, 4, 4
    [[float lists]]
        foo = 1.0, 2.0, 2.0, 2.0, 3.0, 4.0, 4.0
        bar = 1.0, 2.0, 2.0, 2.0, 3.0, 4.0, 4.0
    [[string lists]]
        compulsory = one, two
        one = the quick, brown fox
        two = the quick, brown fox
        thr = the quick, brown fox
        fou = 'the, quick', 'brown , fox'
        fiv = 'the #quick', 'brown #fox'
[single values]
    [[integers]]
        one = 1
        two = 1
        thr = 1
    [[multiline strings with internal comments]]
        one = """
            the quick # or slow
            brown fox # or lazy dog
        """
        two = """
            the quick # or slow
            brown fox # or lazy dog
        """
    [[booleans]]
        one = False
        two = False
        thr = False
        fou = False
        fiv = False
        six = False
    [[multiline strings]]
        one = """
            the quick
            brown fox
        """
        two = """
            the quick
            brown fox
        """
    [[strings with internal comments]]
        fou = the quick brown fox # jumped over
        fiv = the quick brown fox # jumped over
        eig = the quick BROWN fox # jumped over
        nin = the quick BROWN fox # jumped over
    [[strings]]
        one = the quick brown fox
        two = the quick brown fox
        thr = the quick brown fox
        six = the quick brown fox
        sev = the quick brown fox
        an item = the quick brown fox
        override me = OVERRIDDEN
    [[floats]]
        one = 9.9
        two = 9.9
        thr = 9.9

Not sure whether the examples are important/used right now, but maybe once fixed, later we could port to documentation, or to doctests, or even to parsec unit tests; I think.

[hjoliver]

Thanks @kinow. Cylc users should never have to see this, I guess (it was probably for my own use when writing parsec, as I recall, with vague intentions of making it independent of cylc at the time)... but good to have it fixed anyway!

[hjoliver]

One review will do.

[hjoliver]

(I can see from this example that parsec predates our adoption of PEP8 coding style 😬 ).

[kinow]

(I can see from this example that parsec predates our adoption of PEP8 coding style grimacing ).

I started fixing the PEP8 issues too, but gave up to make reviewing simpler (way too many changes for using GitHub's diff UI). But happy to quickly add another commit fixing that if that's better

[hjoliver]

But happy to quickly add another commit fixing that if that's better

No, don't bother for now. I'll merge this now....