Array functions & type checks

**Your Godot version:** v3.3.3

**Issue description:** Documentation incorrectly claims array.has is equivalent to using the 'in' operator

**URL to the documentation page:** https://docs.godotengine.org/en/stable/classes/class_array.html#class-array-method-has

I was thrown for a loop a bit when I tried to use the array.has(x) & array.erase(x) functions and while array.has(x) didn't work, 'x in array' did.
It turns out 'has' & 'erase' (and presumably other array functions) perform type checks before comparing, while the 'in' operator compares values ignoring variable types, in my case this means I was comparing floats & ints without knowing it would cause an issue because their values were equivalent(I was drawing numbers out of Vector2s, that's where the floats came from).