Fix typos in docs.

Motivation:

There are same typos in the docs.

Modifications:

Fix typos. Docs only changing.

Result:

More correct docs.

codec-haproxy/src/main/java/io/netty/handler/codec/haproxy/HAProxyTLV.java

@@ -48,7 +48,7 @@ public class HAProxyTLV extends DefaultByteBufHolder {
         OTHER;
 
         /**
-         * Returns the the {@link Type} for a specific byte value as defined in the PROXY protocol 1.5 spec
+         * Returns the {@link Type} for a specific byte value as defined in the PROXY protocol 1.5 spec
          * <p>
          * If the byte value is not an official one, it will return {@link Type#OTHER}.
          *

codec-http/src/main/java/io/netty/handler/codec/http/HttpContentEncoder.java

@@ -136,7 +136,7 @@ public abstract class HttpContentEncoder extends MessageToMessageCodec<HttpReque
                 }
 
                 if (isFull) {
-                    // Pass through the full response with empty content and continue waiting for the the next resp.
+                    // Pass through the full response with empty content and continue waiting for the next resp.
                     if (!((ByteBufHolder) res).content().isReadable()) {
                         out.add(ReferenceCountUtil.retain(res));
                         break;

codec-http/src/main/java/io/netty/handler/codec/http/cors/CorsConfigBuilder.java

@@ -99,7 +99,7 @@ public final class CorsConfigBuilder {
     /**
      * Web browsers may set the 'Origin' request header to 'null' if a resource is loaded
      * from the local file system. Calling this method will enable a successful CORS response
-     * with a {@code "null"} value for the the CORS response header 'Access-Control-Allow-Origin'.
+     * with a {@code "null"} value for the CORS response header 'Access-Control-Allow-Origin'.
      *
      * @return {@link CorsConfigBuilder} to support method chaining.
      */

codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2HeadersDecoder.java

@@ -123,7 +123,7 @@ public class DefaultHttp2HeadersDecoder implements Http2HeadersDecoder, Http2Hea
             throw e;
         } catch (Throwable e) {
             // Default handler for any other types of errors that may have occurred. For example,
-            // the the Header builder throws IllegalArgumentException if the key or value was invalid
+            // the Header builder throws IllegalArgumentException if the key or value was invalid
             // for any reason (e.g. the key was an invalid pseudo-header).
             throw connectionError(COMPRESSION_ERROR, e, e.getMessage());
         }

codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2RemoteFlowController.java

@@ -456,7 +456,7 @@ public class DefaultHttp2RemoteFlowController implements Http2RemoteFlowControll
         }
 
         /**
-         * Returns the the head of the pending queue, or {@code null} if empty.
+         * Returns the head of the pending queue, or {@code null} if empty.
          */
         private FlowControlled peek() {
             return pendingWriteQueue.peek();

codec-http2/src/main/java/io/netty/handler/codec/http2/HpackHuffmanDecoder.java

@@ -168,8 +168,8 @@ final class HpackHuffmanDecoder {
          * currentBits represents how many of the low order bits of current are actually valid.
          * currentBits will vary between 0 and 15.
          *
-         * symbolBits is the number of bits of the the symbol being decoded, *including* all those
-         * of the parent nodes. symbolBits tells how far down the tree we are. For example, when
+         * symbolBits is the number of bits of the symbol being decoded, *including* all those of
+         * the parent nodes. symbolBits tells how far down the tree we are. For example, when
          * decoding the invalid sequence {0xff, 0xff}, currentBits will be 0, but symbolBits will be
          * 16. This is used to know if buf ended early (before consuming a whole symbol) or if
          * there is too much padding.

codec-http2/src/main/java/io/netty/handler/codec/http2/Http2CodecUtil.java

@@ -162,7 +162,7 @@ public final class Http2CodecUtil {
     }
 
     /**
-     * Returns a buffer containing the the {@link #CONNECTION_PREFACE}.
+     * Returns a buffer containing the {@link #CONNECTION_PREFACE}.
      */
     public static ByteBuf connectionPrefaceBuf() {
         // Return a duplicate so that modifications to the reader index will not affect the original buffer.

codec/src/main/java/io/netty/handler/codec/marshalling/CompatibleMarshallingDecoder.java

@@ -44,7 +44,7 @@ public class CompatibleMarshallingDecoder extends ReplayingDecoder<Void> {
      *        for the {@link Channel}
      * @param maxObjectSize
      *        the maximal size (in bytes) of the {@link Object} to unmarshal. Once the size is
-     *        exceeded the {@link Channel} will get closed. Use a a maxObjectSize of
+     *        exceeded the {@link Channel} will get closed. Use a maxObjectSize of
      *        {@link Integer#MAX_VALUE} to disable this.  You should only do this if you are sure
      *        that the received Objects will never be big and the sending side are trusted, as this
      *        opens the possibility for a DOS-Attack due an {@link OutOfMemoryError}.

codec/src/main/java/io/netty/handler/codec/protobuf/ProtobufVarint32LengthFieldPrepender.java

@@ -23,7 +23,7 @@ import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.MessageToByteEncoder;
 
 /**
- * An encoder that prepends the the Google Protocol Buffers
+ * An encoder that prepends the Google Protocol Buffers
  * <a href="https://developers.google.com/protocol-buffers/docs/encoding?csw=1#varints">Base
  * 128 Varints</a> integer length field. For example:
  * <pre>

common/src/main/java/io/netty/util/concurrent/AbstractScheduledEventExecutor.java

@@ -96,7 +96,7 @@ public abstract class AbstractScheduledEventExecutor extends AbstractEventExecut
 
     /**
      * Return the {@link Runnable} which is ready to be executed with the given {@code nanoTime}.
-     * You should use {@link #nanoTime()} to retrieve the the correct {@code nanoTime}.
+     * You should use {@link #nanoTime()} to retrieve the correct {@code nanoTime}.
      */
     protected final Runnable pollScheduledTask(long nanoTime) {
         assert inEventLoop();

resolver-dns/src/test/java/io/netty/resolver/dns/SearchDomainTest.java

@@ -195,7 +195,7 @@ public class SearchDomainTest {
         resolved = assertResolve(resolver, "host2");
         assertEquals(store.getAddress("host2.bar.com"), resolved);
 
-        // "host3" resolves via the the "foo.com" search path as it is the first one
+        // "host3" resolves via the "foo.com" search path as it is the first one
         resolved = assertResolve(resolver, "host3");
         assertEquals(store.getAddress("host3.foo.com"), resolved);
 

transport/src/main/java/io/netty/channel/ChannelFlushPromiseNotifier.java

@@ -97,7 +97,7 @@ public final class ChannelFlushPromiseNotifier {
 
     /**
      * Notify all {@link ChannelFuture}s that were registered with {@link #add(ChannelPromise, int)} and
-     * their pendingDatasize is smaller after the the current writeCounter returned by {@link #writeCounter()}.
+     * their pendingDatasize is smaller after the current writeCounter returned by {@link #writeCounter()}.
      *
      * After a {@link ChannelFuture} was notified it will be removed from this {@link ChannelFlushPromiseNotifier} and
      * so not receive anymore notification.