[Java]: Code formatting fix.

Author: mjpt777

main/java/uk/co/real_logic/sbe/generation/java/JavaGenerator.java

@@ -258,9 +258,9 @@ private void generateGroupClassHeader(final StringBuilder sb,
 
  sb.append(String.format(
  indent + " public static int headerSize()\n" +
-  indent + " {\n" +
-  indent + " return %d;\n" +
-  indent + " }\n\n",
+ indent + " {\n" +
+ indent + " return %d;\n" +
+ indent + " }\n\n",
  dimensionHeaderSize
  ));
 
@@ -388,10 +388,10 @@ private CharSequence generateVarData(final List<Token> tokens)
 
  sb.append(String.format(
  "\n" +
-  " public static int %sHeaderSize()\n" +
-  " {\n" +
-  " return %d;\n" +
-  " }\n",
+ " public static int %sHeaderSize()\n" +
+ " {\n" +
+ " return %d;\n" +
+ " }\n",
  toLowerFirstChar(propertyName),
  sizeOfLengthField
  ));