style: Migrate to stable-only rustfmt configuration

- Remove nightly-only features from .rustfmt.toml and vendor/ss58-registry/rustfmt.toml
- Removed features: imports_granularity, wrap_comments, comment_width,
  reorder_impl_items, spaces_around_ranges, binop_separator,
  match_arm_blocks, trailing_semicolon, trailing_comma
- Format all 898 affected files with stable rustfmt
- Ensures long-term reliability without nightly toolchain dependency

pezcumulus/primitives/core/src/lib.rs

@@ -353,11 +353,12 @@ impl CumulusDigestItem {
 /// well-behaving runtimes should not produce headers with more than one.
 pub fn extract_relay_parent(digest: &Digest) -> Option<relay_chain::Hash> {
 	digest.convert_first(|d| match d {
-		DigestItem::Consensus(id, val) if id == &CUMULUS_CONSENSUS_ID =>
+		DigestItem::Consensus(id, val) if id == &CUMULUS_CONSENSUS_ID => {
 			match CumulusDigestItem::decode(&mut &val[..]) {
 				Ok(CumulusDigestItem::RelayParent(hash)) => Some(hash),
 				_ => None,
-			},
+			}
+		},
 		_ => None,
 	})
 }

pezcumulus/primitives/timestamp/src/lib.rs

@@ -61,8 +61,8 @@ impl InherentDataProvider {
 	pub fn provide_inherent_data(&self, inherent_data: &mut InherentData) -> Result<(), Error> {
 		// As the teyrchain starts building at around `relay_chain_slot + 1` we use that slot to
 		// calculate the timestamp.
-		let data: InherentType = ((*self.relay_chain_slot + 1) *
-			self.relay_chain_slot_duration.as_millis() as u64)
+		let data: InherentType = ((*self.relay_chain_slot + 1)
+			* self.relay_chain_slot_duration.as_millis() as u64)
 			.into();
 
 		inherent_data.put_data(INHERENT_IDENTIFIER, &data)

pezcumulus/primitives/utility/src/tests/swap_first.rs

@@ -538,12 +538,14 @@ pub mod mock {
 			a: &Asset,
 		) -> core::result::Result<(AssetId, Balance), xcm_executor::traits::Error> {
 			match a {
-				Asset { fun: Fungible(amount), id: AssetId(inner_location) } =>
+				Asset { fun: Fungible(amount), id: AssetId(inner_location) } => {
 					match inner_location.unpack() {
-						(0, [Junction::GeneralIndex(id)]) =>
-							Ok(((*id).try_into().unwrap(), *amount)),
+						(0, [Junction::GeneralIndex(id)]) => {
+							Ok(((*id).try_into().unwrap(), *amount))
+						},
 						_ => Err(xcm_executor::traits::Error::AssetNotHandled),
-					},
+					}
+				},
 				_ => Err(xcm_executor::traits::Error::AssetNotHandled),
 			}
 		}