chore: fix fmt with new style_edition

fmt keeps changing all the time. Now they introduced new "editions" feature, which by default does a lot of changes to the codebase by mingling with alphabetical sorting of all imports, doing them in case-insentive way. This PR allows to avoid that dramatic changes

.rustfmt.toml

@@ -1,5 +1,5 @@
 edition = "2021"
-version = "Two"
+style_edition = "2021"
 
 max_width = 100
 array_width = 100

derive/src/xkey.rs

@@ -49,8 +49,8 @@ pub enum XkeyAccountError {
     /// information.
     DepthMismatch,
 
-    /// extended key child derivation index does not match the last derivation index in the provided
-    /// origin information.
+    /// extended key child derivation index does not match the last derivation index in the
+    /// provided origin information.
     ParentMismatch,
 
     /// extended key has derivation depth 1, but its parent fingerprint does not match the provided

psbt/src/data.rs

@@ -909,13 +909,13 @@ impl Input {
         self.redeem_script = None; // 0x04
         self.witness_script = None; // 0x05
         self.bip32_derivation.clear(); // 0x05
-        // finalized witness 0x06 and 0x07 are not clear
-        // 0x09 Proof of reserves not yet supported
+                                       // finalized witness 0x06 and 0x07 are not clear
+                                       // 0x09 Proof of reserves not yet supported
         self.ripemd160.clear(); // 0x0a
         self.sha256.clear(); // 0x0b
         self.hash160.clear(); // 0x0c
         self.hash256.clear(); // 0x0d
-        // psbt v2 fields till 0x012 not supported
+                              // psbt v2 fields till 0x012 not supported
         self.tap_key_sig = None; // 0x013
         self.tap_script_sig.clear(); // 0x014
         self.tap_leaf_script.clear(); // 0x015

src/signers.rs

@@ -81,7 +81,9 @@ impl<'a> TestnetRefSigner<'a> {
 }
 
 impl<'a> Signer for TestnetRefSigner<'a> {
-    type Sign<'s> = Self where Self: 's;
+    type Sign<'s>
+        = Self
+    where Self: 's;
 
     fn approve(&self, _: &Psbt) -> Result<Self::Sign<'_>, Rejected> { Ok(self.clone()) }
 }