Clarify values of boolean parameters in GET Statements

[garemoko]

Fixes #536

I may have gone off piste with formatting here. Feel free to critique.

[garemoko]

And the formatting doesn't work in tables... fixing...

[fugu13]

Hmm, using double quoted strings might lead some people to try putting strings there. Maybe code-formatting instead of quoting? Same below for the other two occurrences.

[andyjohnson]

I'd recommend using single quotes for all of the values as they don't actually take on booleans as the code tag may suggest. How do others feel about it?

[garemoko]

I quite like the code tags for values. A quick look through the spec suggests that we generally (but not always) use double quotes for values, but since we're using those for properties, that's probably unhelpful. There's actually a lot of properties in single quotes.

[andyjohnson]

+1, once I sat down and looked at the styles more carefully I realize a sweep is needed - this PR does what it should!

[ljwolford]

+1