feat: Add option3 exercise

exercises/option/option3.rs

@@ -0,0 +1,20 @@
+// option2.rs
+// Make me compile! Execute `rustlings hint option3` for hints
+
+// I AM NOT DONE
+
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+fn main() {
+    let y: Option<Point> = Some(Point { x: 100, y: 200 });
+
+    match y {
+        Some(p) => println!("Co-ordinates are{},{} ", p.x, p.y),
+        _ => println!("no match"),
+    }
+    // Fix without deleting this line.
+    y;
+}

info.toml

@@ -585,6 +585,16 @@ For example: Some(Some(variable)) = variable2
 Also see Option::flatten
 """
 
+[[exercises]]
+name = "option3"
+path = "exercises/option/option3.rs"
+mode = "compile"
+hint = """
+The compiler says a partial move happened in the `match`
+statement. How can this be avoided ? The compiler shows the correction
+needed. After making the correction as suggested by the compiler, do
+read: https://doc.rust-lang.org/std/keyword.ref.html"""
+
 [[exercises]]
 name = "result1"
 path = "exercises/error_handling/result1.rs"