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

bizinikiwi/primitives/consensus/grandpa/src/lib.rs

@@ -355,8 +355,8 @@ where
 	macro_rules! check {
 		( $equivocation:expr, $message:expr ) => {
 			// if both votes have the same target the equivocation is invalid.
-			if $equivocation.first.0.target_hash == $equivocation.second.0.target_hash &&
-				$equivocation.first.0.target_number == $equivocation.second.0.target_number
+			if $equivocation.first.0.target_hash == $equivocation.second.0.target_hash
+				&& $equivocation.first.0.target_number == $equivocation.second.0.target_number
 			{
 				return false;
 			}