LegacyAddress, BitcoinSerializer, MessageSerializer, TransactionReceivedInBlockListener, ECKey, ChildKeyDerivationTest: fix repetitive words in comments

core/src/main/java/org/bitcoinj/base/LegacyAddress.java

@@ -161,7 +161,7 @@ public class LegacyAddress implements Address {
      * Construct a {@link LegacyAddress} from its base58 form.
      * 
      * @param params
-     *            expected network this address is valid for, or null if if the network should be derived from the
+     *            expected network this address is valid for, or null if the network should be derived from the
      *            base58
      * @param base58
      *            base58-encoded textual form of the address

core/src/main/java/org/bitcoinj/core/BitcoinSerializer.java

@@ -135,7 +135,7 @@ public class BitcoinSerializer extends MessageSerializer {
     }
 
     /**
-     * Writes message to to the output stream.
+     * Writes message to the output stream.
      */
     @Override
     public void serialize(String name, byte[] message, OutputStream out) throws IOException {
@@ -160,7 +160,7 @@ public class BitcoinSerializer extends MessageSerializer {
     }
 
     /**
-     * Writes message to to the output stream.
+     * Writes message to the output stream.
      */
     @Override
     public void serialize(Message message, OutputStream out) throws IOException {

core/src/main/java/org/bitcoinj/core/MessageSerializer.java

@@ -106,7 +106,7 @@ public abstract class MessageSerializer {
     public abstract void seekPastMagicBytes(ByteBuffer in) throws BufferUnderflowException;
 
     /**
-     * Writes message to to the output stream.
+     * Writes message to the output stream.
      * 
      * @throws UnsupportedOperationException if this serializer/deserializer
      * does not support serialization. This can occur either because it's a dummy
@@ -116,7 +116,7 @@ public abstract class MessageSerializer {
     public abstract void serialize(String name, byte[] message, OutputStream out) throws IOException, UnsupportedOperationException;
 
     /**
-     * Writes message to to the output stream.
+     * Writes message to the output stream.
      * 
      * @throws UnsupportedOperationException if this serializer/deserializer
      * does not support serialization. This can occur either because it's a dummy

core/src/main/java/org/bitcoinj/core/listeners/TransactionReceivedInBlockListener.java

@@ -56,7 +56,7 @@ public interface TransactionReceivedInBlockListener {
      * compared to the relativity count of another transaction received inside the same block. It is used to establish
      * an ordering of transactions relative to one another.</p>
      *
-     * <p>This method should return false if the given tx hash isn't known about, e.g. because the the transaction was
+     * <p>This method should return false if the given tx hash isn't known about, e.g. because the transaction was
      * a Bloom false positive. If it was known about and stored, it should return true. The caller may need to know
      * this to calculate the effective FP rate.</p>
      *

core/src/main/java/org/bitcoinj/crypto/ECKey.java

@@ -1224,7 +1224,7 @@ public class ECKey implements EncryptableItem {
     }
 
     /**
-     * Returns the the encrypted private key bytes and initialisation vector for this ECKey, or null if the ECKey
+     * Returns the encrypted private key bytes and initialisation vector for this ECKey, or null if the ECKey
      * is not encrypted.
      */
     @Nullable

core/src/test/java/org/bitcoinj/crypto/ChildKeyDerivationTest.java

@@ -305,7 +305,7 @@ public class ChildKeyDerivationTest {
         assertEquals("Parent fingerprint of deserialized parentless private HD key is wrong",
                           key.getParentFingerprint(), 0xbef5a2f9);
 
-        // These encodings are of the the root key of that hierarchy
+        // These encodings are of the root key of that hierarchy
         assertEquals("Parent fingerprint of root node public HD key should be zero",
                           DeterministicKey.deserializeB58("xpub661MyMwAqRbcFW31YEwpkMuc5THy2PSt5bDMsktWQcFF8syAmRUapSCGu8ED9W6oDMSgv6Zz8idoc4a6mr8BDzTJY47LJhkJ8UB7WEGuduB", MAINNET).getParentFingerprint(),
                           0);