Merge pull request #1471 from ChromaMaster/fix/custom-types-structs-square-activity

fix: Use the point as top left corner for `square`

Author: marioidival

src/custom_types/structs.md

@@ -89,7 +89,7 @@ fn main() {
 1. Add a function `rect_area` which calculates the area of a `Rectangle` (try
    using nested destructuring).
 2. Add a function `square` which takes a `Point` and a `f32` as arguments, and
-   returns a `Rectangle` with its lower left corner on the point, and a width and
+   returns a `Rectangle` with its top left corner on the point, and a width and
    height corresponding to the `f32`.
 
 ### See also