copy effects key to Base.infer_effects

[MasonProtter]

Copied from the docstring of Core.Compiler.Effects, this makes it easier to figure out what the output of Base.infer_effects is actually telling you.

[topolarity]

It's embarrassing to admit how many times I've had to hunt for this

[giordano]

I'm not against having this information in this docstring, but I'm worried about the duplication and the possibility of this information to get out-of-sync, at some point someone will miss to update it everywhere, since it's highly non-obvious it's repeated in multiple places.

[Keno]

Yeah, let's only have one place in the source code and paste it into the places that need it. I don't know if we have that feature in the Base doc system, but if not I guess we can hack something

[MasonProtter]

Okay, I've de-duplicated the information into a global variable and then interpolated it into the two respective docstrings. There's probably a more elegant way to do this but that's what I came up with.