style: rustfmt the issue #6 parity changes

`cargo fmt --check` (CI) flagged the hand-formatted destructure in the
lexer test and an over-long line in export.rs. No behavior change.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

crates/nuwiki-core/tests/lexer.rs

@@ -180,8 +180,12 @@ fn preformatted_block_parses_language() {
 fn preformatted_block_parses_attrs() {
     let lexed = lex("{{{rust class=\"hl\" key=val\nx\n}}}\n");
     let PreformattedOpen {
-        language, attrs, raw, ..
-    } = &lexed[0] else {
+        language,
+        attrs,
+        raw,
+        ..
+    } = &lexed[0]
+    else {
         panic!("expected PreformattedOpen");
     };
     assert_eq!(language.as_deref(), Some("rust"));

crates/nuwiki-lsp/src/export.rs

@@ -250,7 +250,8 @@ pub fn render_page_html(
             if let Some(ext) = &ext {
                 if matches!(t.kind, LinkKind::Wiki | LinkKind::Interwiki) {
                     if let Some(p) = t.path.take() {
-                        t.path = Some(crate::index::strip_wiki_extension(&p, Some(ext)).to_string());
+                        t.path =
+                            Some(crate::index::strip_wiki_extension(&p, Some(ext)).to_string());
                     }
                 }
             }