Documentation of TextArea's fontprops keyword argument is misleading

[galenlynch]

The documentation for TextArea strongly suggests that the keyword argument fontprops should be a FontProperties object. However, inspecting the source code suggests that fontprops should instead be a dictionary of keyword arguments that will be passed to the Text object inside TextArea.

I propose rewording the documentation to make it clear that fontprops should be a dictionary of keyword arguments.

[ImportanceOfBeingErnest]

There are two options:

1. Update the documentation with what the code does. (easy)
2. Update the code such that it'll indeed also allow for FontProperties objects as input. Then update the documentation.

@galenlynch Any interest in making that change an submitting a pull request?

[timhoffm]

Actually, 1. is the way to go. The argument is correctly called textprops and passed as Text(..., **textprops). Thus FontProperties is just plain wrong.

[galenlynch]

Sure, glad to make a PR with option 1.