Provide better explanation and examples to consecutive collectors

[rsynek]

The section describing consecutive collectors is missing examples to show what data the collectors form in the stream.

Proposal:
Prepare an example data and an illustration for both consecutiveSequences and connectedRanges to clearly show how the data are sorted and how they form sequences and connected ranges.
Show the individual tuples based on this example data.

[triceo]

@TomCools Would this be something you'd be interested in looking into?

[TomCools]

Jup, will do.