Consistent Plurals (contents vs content, etc.)

[mscuthbert]

Writing my first MNX converter (MNX<->music21) and wondering if it would help later parsers and humans if we consistently used plurals for anything whose value/right-hand-side is an array:

We currently use "global" not "globals" because the value is an object, but within "global" is "measures" implying an array.

The current major inconsistency in this is in parts[i].measures[j].content[k] -- what about adding the extra letter to make this parts[i].measures[j].contents[k]?

[mscuthbert]

(though "global" might not be the best example since it's a keyword in Python -- already got bit by it in a converter)