Fix Clippy (#2522)

* Import Clippy config from Polkadot

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Auto clippy fix

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* No tabs in comments

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Prefer matches

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Dont drop references

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Trivial

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Refactor

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* fmt

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* add clippy to ci

* Clippy reborrow

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Update client/pov-recovery/src/lib.rs

Co-authored-by: Bastian Köcher <git@kchr.de>

* Update client/pov-recovery/src/lib.rs

Co-authored-by: Bastian Köcher <git@kchr.de>

* Partially revert 'Prefer matches'

Using matches! instead of match does give less compiler
checks as per review from @chevdor.

Partially reverts 8c0609677f3ea040f77fffd5be6facf7c3fec95c

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Update .cargo/config.toml

Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

* Revert revert 💩

Should be fine to use matches! macro since it is an explicit whitelist,
not wildcard matching.

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: alvicsam <alvicsam@gmail.com>
Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: Chevdor <chevdor@users.noreply.github.com>
Co-authored-by: parity-processbot <>

cumulus/polkadot-parachain/tests/purge_chain_works.rs

@@ -38,7 +38,7 @@ async fn purge_chain_works() {
 	assert!(base_dir.path().join("polkadot/chains/dev/db/full").exists());
 
 	let status = Command::new(cargo_bin("polkadot-parachain"))
-		.args(&["purge-chain", "-d"])
+		.args(["purge-chain", "-d"])
 		.arg(base_dir.path())
 		.arg("-y")
 		.status()