Handled Review commments from Zoe

Author: joviegas

.changes/next-release/bugfix-AmazonS3-bb097c9.json

@@ -2,5 +2,5 @@
     "type": "bugfix",
     "category": "Amazon S3",
     "contributor": "",
-    "description": "Fix StreamingRequestInterceptor to skip Expect: 100-continue header when PutObject or UploadPart requests have zero content length."
+    "description": "Skip Expect: 100-continue header for PutObject and UploadPart requests with zero content length"
 }

services/s3/src/test/java/software/amazon/awssdk/services/s3/functionaltests/Expect100ContinueHeaderTest.java

@@ -69,7 +69,7 @@
  */
 @WireMockTest(httpsEnabled = true)
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
-public class Expect100ContinueHeaderTest {
+class Expect100ContinueHeaderTest {
 
     private static final String BUCKET = "test-bucket";
     private static final String KEY = "test-key";
@@ -216,6 +216,7 @@ public void request(long n) {
 
                 @Override
                 public void cancel() {
+                    // No action.
                 }
             });
         };
@@ -246,6 +247,7 @@ public void request(long n) {
 
                 @Override
                 public void cancel() {
+                    // No action.
                 }
             });
         };