GH-2496: Doc Polishing for Deprecations

Author: garyrussell

spring-kafka-docs/src/main/asciidoc/retrytopic.adoc

@@ -735,7 +735,7 @@ NOTE: The default behavior is to suffix with the delay values, except for fixed
 If you're using fixed delay policies such as `FixedBackOffPolicy` or `NoBackOffPolicy` you can use a single topic to accomplish the non-blocking retries.
 This topic will be suffixed with the provided or default suffix, and will not have either the index or the delay values appended.
 
-NOTE: `FixedDelayStrategy` is now deprecated, and will be replaced by `SameIntervalTopicReuseStrategy` in a future release.
+NOTE: The previous `FixedDelayStrategy` is now deprecated, and can be replaced by `SameIntervalTopicReuseStrategy`.
 
 ====
 [source, java]

spring-kafka/src/main/java/org/springframework/kafka/retrytopic/RetryTopicConfigurationBuilder.java

@@ -261,18 +261,15 @@ public RetryTopicConfigurationBuilder sameIntervalTopicReuseStrategy(SameInterva
 	}
 
 	/**
-	 * Configure the use of a single retry topic
-	 * for the attempts that have the same backoff interval
-	 * (as long as these attempts are in the end of the chain).
+	 * Configure the use of a single retry topic for the attempts that have the same
+	 * backoff interval (as long as these attempts are in the end of the chain).
 	 *
-	 * Currently used only for the last retries of exponential backoff,
-	 * and in a future release this will dictate whether to use
-	 * a single retry topic for fixed backoff.
+	 * Used for the last retries of exponential backoff (when a {@code maxDelay} is
+	 * provided), and to use a single retry topic for fixed backoff.
 	 *
 	 * @return the builder.
 	 * @since 3.0.4
 	 * @see SameIntervalTopicReuseStrategy
-	 *
 	 */
 	public RetryTopicConfigurationBuilder useSingleTopicForSameIntervals() {
 		this.sameIntervalTopicReuseStrategy = SameIntervalTopicReuseStrategy.SINGLE_TOPIC;