Remove duplicated words in Javadoc

spring-core/src/main/java/org/springframework/core/codec/StringDecoder.java

@@ -45,7 +45,7 @@ import org.springframework.util.MimeTypeUtils;
  * Decode from a data buffer stream to a {@code String} stream, either splitting
  * or aggregating incoming data chunks to realign along newlines delimiters
  * and produce a stream of strings. This is useful for streaming but is also
- * necessary to ensure that that multibyte characters can be decoded correctly,
+ * necessary to ensure that multi-byte characters can be decoded correctly,
  * avoiding split-character issues. The default delimiters used by default are
  * {@code \n} and {@code \r\n} but that can be customized.
  *

spring-messaging/src/main/java/org/springframework/messaging/simp/broker/AbstractBrokerMessageHandler.java

@@ -130,7 +130,7 @@ public abstract class AbstractBrokerMessageHandler
 	}
 
 	/**
-	 * Return destination prefixes prefixes to use to filter messages to forward
+	 * Return destination prefixes to use to filter messages to forward
 	 * to the broker. Messages that have a destination and where the destination
 	 * doesn't match are ignored.
 	 * <p>By default this is not set.

spring-r2dbc/src/main/java/org/springframework/r2dbc/core/NamedParameterExpander.java

@@ -74,7 +74,7 @@ class NamedParameterExpander {
 	 * placeholders to be used for a select list. Select lists should be limited
 	 * to 100 or fewer elements. A larger number of elements is not guaranteed to be
 	 * supported by the database and is strictly vendor-dependent.
-	 * @param sql sql the original SQL statement
+	 * @param sql the original SQL statement
 	 * @param bindMarkersFactory the bind marker factory
 	 * @param paramSource the source for named parameters
 	 * @return the expanded sql that accepts bind parameters and allows for execution

spring-webmvc/src/main/java/org/springframework/web/servlet/tags/ParamAware.java

@@ -28,7 +28,7 @@ public interface ParamAware {
 	/**
 	 * Callback hook for nested spring:param tags to pass their value
 	 * to the parent tag.
-	 * @param param the result of the nested {@code spring:param} tag
+	 * @param the result of the nested {@code spring:param} tag
 	 */
 	void addParam(Param param);