tinyNotation --> tiny doc clarification ;)

[MarkGotham]

Problem summary

I think we could clarify the docs on octave notation in tinyNotation.

Steps to reproduce

In the Helmholtz-like pitch spelling used by tiny notation, the correct encoding is f'#

This gives octave 5 (correctly):

converter.parse("tinyNotation: f'#").recurse().notes[0].octave

But this gives octave 4 (probably because that's the octave default):

converter.parse("tinyNotation: f#'").recurse().notes[0].octave

The character succession f'# may be correct. (A quick search does not answer the question as nobody seems to demonstrate this scenario). All the same, it couldn't hurt to stick in a note to that effect. It took me a while to debug the problem.