Add a reference to pow to the description of exp.

This might be especially usefull since godot script doesn't support ** or ^ as operators, so beginners might search for the exponential function, when what they really need is the pow function.

This is exactly what happened to me and since I couldn't find helpfull information in the documentation I had to look it up online, where I found the answer on a helpfull [reddit thread](https://www.reddit.com/r/godot/comments/3mvwz0/how_do_i_do_exponents_in_godot/).

@akien-mga told me how to reference methods here:
godotengine#30909

0 files changed, 0 insertions, 0 deletions