warning: `to_string` applied to a type that implements `Display` in `println!` args
  --> src/main.rs:36:36
   |
36 |             println!("Error: {}", e.to_string());
   |                                    ^^^^^^^^^^^^ help: remove this
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#to_string_in_format_args
   = note: `#[warn(clippy::to_string_in_format_args)]` on by default

warning: methods with the following characteristics: (`to_*` and `self` type is `Copy`) usually take `self` by value
  --> src/tile.rs:68:34
   |
68 |     pub(crate) fn to_test_string(&self) -> String {
   |                                  ^^^^^
   |
   = help: consider choosing a less ambiguous name
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
   = note: `#[warn(clippy::wrong_self_convention)]` on by default

warning: `to_string` applied to a type that implements `Display` in `println!` args
  --> src/main.rs:36:36
   |
36 |             println!("Error: {}", e.to_string());
   |                                    ^^^^^^^^^^^^ help: remove this
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#to_string_in_format_args
   = note: `#[warn(clippy::to_string_in_format_args)]` on by default

warning: casting to the same type is unnecessary (`char` -> `char`)
  --> src/importer/sdk.rs:36:27
   |
36 |                     match *tile as char {
   |                           ^^^^^^^^^^^^^ help: try: `{ *tile }`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
   = note: `#[warn(clippy::unnecessary_cast)]` on by default

warning: methods with the following characteristics: (`to_*` and `self` type is `Copy`) usually take `self` by value
  --> src/tile.rs:68:34
   |
68 |     pub(crate) fn to_test_string(&self) -> String {
   |                                  ^^^^^
   |
   = help: consider choosing a less ambiguous name
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
   = note: `#[warn(clippy::wrong_self_convention)]` on by default

warning: the loop variable `i` is used to index `tiles`
  --> src/helpers.rs:51:14
   |
51 |     for i in 0..9 {
   |              ^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
help: consider using an iterator and enumerate()
   |
51 |     for (i, <item>) in tiles.iter_mut().enumerate() {
   |         ~~~~~~~~~~~    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

warning: casting to the same type is unnecessary (`char` -> `char`)
  --> src/importer/sdk.rs:36:27
   |
36 |                     match *tile as char {
   |                           ^^^^^^^^^^^^^ help: try: `{ *tile }`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
   = note: `#[warn(clippy::unnecessary_cast)]` on by default

warning: the borrowed expression implements the required traits
  --> src/helpers.rs:13:16
   |
13 |     File::open(&path).map_err(|_| SudokuError::FileRead(filename.to_string()))
   |                ^^^^^ help: change this to: `path`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
   = note: `#[warn(clippy::needless_borrows_for_generic_args)]` on by default

warning: the loop variable `i` is used to index `tiles`
  --> src/helpers.rs:51:14
   |
51 |     for i in 0..9 {
   |              ^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
help: consider using an iterator and enumerate()
   |
51 |     for (i, <item>) in tiles.iter_mut().enumerate() {
   |         ~~~~~~~~~~~    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

warning: the borrowed expression implements the required traits
  --> src/helpers.rs:13:16
   |
13 |     File::open(&path).map_err(|_| SudokuError::FileRead(filename.to_string()))
   |                ^^^^^ help: change this to: `path`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
   = note: `#[warn(clippy::needless_borrows_for_generic_args)]` on by default

warning: it looks like you're manually copying between slices
  --> src/board.rs:88:17
   |
88 | /                 for y in 0..9 {
89 | |                     tiles[y] = self.grid[row as usize][y];
90 | |                 }
   | |_________________^ help: try replacing the loop by: `tiles.copy_from_slice(&self.grid[row as usize]);`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
   = note: `#[warn(clippy::manual_memcpy)]` on by default

warning: it looks like you're manually copying between slices
  --> src/board.rs:88:17
   |
88 | /                 for y in 0..9 {
89 | |                     tiles[y] = self.grid[row as usize][y];
90 | |                 }
   | |_________________^ help: try replacing the loop by: `tiles.copy_from_slice(&self.grid[row as usize]);`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
   = note: `#[warn(clippy::manual_memcpy)]` on by default

warning: the loop variable `x` is used to index `tiles`
  --> src/board.rs:83:26
   |
83 |                 for x in 0..9 {
   |                          ^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
   = note: `#[warn(clippy::needless_range_loop)]` on by default
help: consider using an iterator and enumerate()
   |
83 |                 for (x, <item>) in tiles.iter_mut().enumerate() {
   |                     ~~~~~~~~~~~    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

warning: the loop variable `x` is used to index `tiles`
  --> src/board.rs:83:26
   |
83 |                 for x in 0..9 {
   |                          ^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
   = note: `#[warn(clippy::needless_range_loop)]` on by default
help: consider using an iterator and enumerate()
   |
83 |                 for (x, <item>) in tiles.iter_mut().enumerate() {
   |                     ~~~~~~~~~~~    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~