style(tests): format the Java class fixture signature

The captured main baseline has an unformatted helper signature. Apply the
repository formatter so the required style gate can run to completion.

Co-authored-by: Kaoru0822 <208281322+kaoru0822-kitauji@users.noreply.github.com>
(cherry picked from commit b5a25fbdda)

tests/fixtures/javaClassFile.ts

@@ -1,5 +1,8 @@
 /** Build a valid minimal JVM class file, optionally with an unused UTF-8 constant. */
-export const javaClassFile = (extraUtf8Bytes = 0, fatCpuLookalike = false): Buffer => {
+export const javaClassFile = (
+  extraUtf8Bytes = 0,
+  fatCpuLookalike = false,
+): Buffer => {
   const utf8 = (value: string): Buffer => {
     const bytes = Buffer.from(value, "utf8");
     const entry = Buffer.alloc(3 + bytes.length);