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

pezkuwi/xcm/xcm-executor/src/lib.rs

@@ -540,8 +540,8 @@ impl<Config: config::Config> XcmExecutor<Config> {
 		);
 		if current_surplus.any_gt(Weight::zero()) {
 			if let Some(w) = self.trader.refund_weight(current_surplus, &self.context) {
-				if !self.holding.contains_asset(&(w.id.clone(), 1).into()) &&
-					self.ensure_can_subsume_assets(1).is_err()
+				if !self.holding.contains_asset(&(w.id.clone(), 1).into())
+					&& self.ensure_can_subsume_assets(1).is_err()
 				{
 					let _ = self
 						.trader
@@ -890,10 +890,11 @@ impl<Config: config::Config> XcmExecutor<Config> {
 						});
 					}
 				},
-				Err(ref mut error) =>
+				Err(ref mut error) => {
 					if let Ok(x) = Config::Weigher::instr_weight(&mut instr) {
 						error.weight.saturating_accrue(x)
-					},
+					}
+				},
 			}
 		}
 		result