add-examples-to-destructure-tuples (#1566)

Author: AlexCue987

src/flow_control/match/destructuring/destructure_tuple.md

@@ -13,6 +13,8 @@ fn main() {
         // Destructure the second and third elements
         (0, y, z) => println!("First is `0`, `y` is {:?}, and `z` is {:?}", y, z),
         (1, ..)  => println!("First is `1` and the rest doesn't matter"),
+        (.., 2)  => println!("last is `2` and the rest doesn't matter"),
+        (3, .., 4)  => println!("First is `3`, last is `4`, and the rest doesn't matter"),
         // `..` can be used to ignore the rest of the tuple
         _      => println!("It doesn't matter what they are"),
         // `_` means don't bind the value to a variable