Consider Adding #[allow(dead_code)] To Examples

[JimLynchCodes]

These examples are great, but when the student successfully completes the exercise there are still a bunch of warnings in the output.

eg:

02_match   test   pass!    2 warnings   

 1  warning: enum `Shape` is never used
  --> exercises/05_ticket_v2/02_match/src/lib.rs:2:6
   |
 2 | enum Shape {
   |      ^^^^^
   |
   = note: `#[warn(dead_code)]` on by default
 
 2  warning: method `n_sides` is never used
   --> exercises/05_ticket_v2/02_match/src/lib.rs:13:12
    |
 10 | impl Shape {
    | ---------- method in this implementation
 ...
 13 |     pub fn n_sides(&self) -> u8 {
    |            ^^^^^^^

Consider annotating the Shape enum and n_sides functions here with the attribute macro #[allow(dead_code)] so that the output is green and lovely:

 02_match   test   pass!  
                                                                                       ▐
running 5 tests                                                                        ▐
test tests::test_circle ... ok                                                         ▐
test tests::test_pentagon ... ok                                                       ▐
test tests::test_rectangle ... ok                                                      ▐
test tests::test_square ... ok                                                         ▐
test tests::test_triangle ... ok                                                       ▐
                                                                                       ▐
test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished i ▐
n 0.00s                                                                                ▐
                                                                                       ▐
   Doc-tests match_

running 0 tests

I can help with this if you decide you want to update all the examples to include this. 👍

Or even better, maybe there is a way to add it to one overall Cargo.toml file?