fix(tests): align generated formatting for accept assertion

Author: matoous

src/test/java/com/sumup/sdk/core/ApiClientTest.java

@@ -93,9 +93,7 @@ void defaultRuntimeHeadersAreIncluded() {
     assertEquals("java", headers.firstValue("X-Sumup-Runtime").orElse(null));
     assertEquals(
         Runtime.version().toString(), headers.firstValue("X-Sumup-Runtime-Version").orElse(null));
-    assertEquals(
-        "application/problem+json, application/json",
-        headers.firstValue("Accept").orElse(null));
+    assertEquals("application/problem+json, application/json", headers.firstValue("Accept").orElse(null));
   }
 
   @Test