docs(linter): fix formatting inconsistencies in rule docs (oxc-project#11227)

Author: ulrichstark

crates/oxc_linter/src/rules/eslint/max_classes_per_file.rs

@@ -56,7 +56,6 @@ declare_oxc_lint!(
     ///
     /// Examples of **correct** code for this rule:
     /// ```js
-    ///
     /// function foo() {
     ///     var bar = 1;
     ///     let baz = 2;

crates/oxc_linter/src/rules/eslint/no_useless_backreference.rs

@@ -195,7 +195,7 @@ impl<'ast> Visit<'ast> for RegexCollector<'ast> {
 
 /// Determines if a backreference is useless — meaning it references a capturing
 /// group that hasn't (and cannot) participate at the time it's evaluated.
-//////
+///
 /// Returns the reason as a `Problem` if one is found; otherwise returns `None`.
 ///
 /// # Problem types and examples:

crates/oxc_linter/src/rules/jest/no_disabled_tests.rs

@@ -29,7 +29,7 @@ declare_oxc_lint!(
     ///
     /// ### Example
     ///
-    ///```js
+    /// ```js
     /// describe.skip('foo', () => {});
     /// it.skip('foo', () => {});
     /// test.skip('foo', () => {});

crates/oxc_linter/src/rules/nextjs/no_duplicate_head.rs

@@ -40,9 +40,9 @@ declare_oxc_lint!(
     ///           <NextScript />
     ///         </body>
     ///       </Html>
-    ///    )
-    ///  }
-    ///}
+    ///     )
+    ///   }
+    /// }
     /// export default MyDocument
     /// ```
     ///
@@ -61,9 +61,9 @@ declare_oxc_lint!(
     ///           <NextScript />
     ///         </body>
     ///       </Html>
-    ///    )
-    ///  }
-    ///}
+    ///     )
+    ///   }
+    /// }
     /// export default MyDocument
     /// ```
     NoDuplicateHead,