Improve docstrings by enclosing references to kwargs, classes, and methods in backticks

[dpanici]

Our docstrings could be improved by referring to kwargs inside the docstring with back ticks like "corresponds to size of kwarg" instead of "corresponds to size of kwarg"

[dpanici]

Use double backticks (THING) for code args/variables etc., but class names which are captialized can be in plain text as is - basically use the backticks to make sure the docstring is clear