delete all duplicate empty blanks (#5758)

Signed-off-by: Xiang Dai <764524258@qq.com>
diff --git a/conformance/ConformanceJava.java b/conformance/ConformanceJava.java
index 008f3bc..e5e1594 100644
--- a/conformance/ConformanceJava.java
+++ b/conformance/ConformanceJava.java
@@ -57,7 +57,7 @@
     buf[3] = (byte)(val >> 24);
     writeToStdout(buf);
   }
-  
+
   private enum BinaryDecoderType {
     BTYE_STRING_DECODER,
     BYTE_ARRAY_DECODER,
@@ -69,11 +69,11 @@
   }
 
   private static class BinaryDecoder <MessageType extends AbstractMessage> {
-    public MessageType decode (ByteString bytes, BinaryDecoderType type, 
+    public MessageType decode (ByteString bytes, BinaryDecoderType type,
         Parser <MessageType> parser, ExtensionRegistry extensions)
       throws InvalidProtocolBufferException {
       switch (type) {
-        case BTYE_STRING_DECODER: 
+        case BTYE_STRING_DECODER:
           return parser.parseFrom(bytes, extensions);
         case BYTE_ARRAY_DECODER:
           return parser.parseFrom(bytes.toByteArray(), extensions);
@@ -94,7 +94,7 @@
           } catch (InvalidProtocolBufferException e) {
             throw e;
           }
-        } 
+        }
         case DIRECT_BYTE_BUFFER_DECODER: {
           ByteBuffer buffer = ByteBuffer.allocateDirect(bytes.size());
           bytes.copyTo(buffer);
@@ -135,7 +135,7 @@
     ArrayList <MessageType> messages = new ArrayList <MessageType> ();
     ArrayList <InvalidProtocolBufferException> exceptions =
         new ArrayList <InvalidProtocolBufferException>();
-    
+
     for (int i = 0; i < BinaryDecoderType.values().length; i++) {
       messages.add(null);
       exceptions.add(null);
@@ -273,7 +273,7 @@
         throw new RuntimeException("Unspecified output format.");
 
       case PROTOBUF: {
-        ByteString MessageString = testMessage.toByteString(); 
+        ByteString MessageString = testMessage.toByteString();
         return Conformance.ConformanceResponse.newBuilder().setProtobufPayload(MessageString).build();
       }