use copyOfRange

Author: chzyer

src/com/qiniu/utils/InputStreamAt.java

@@ -160,8 +160,7 @@ public static byte[] copyOfRange(byte[] original, int from, int to) {
 		int newLength = to - from;
 		if (newLength < 0) throw new IllegalArgumentException(from + " > " + to);
 		byte[] copy = new byte[newLength];
-		System.arraycopy(original, from, copy, 0,
-		Math.min(original.length - from, newLength));
+		System.arraycopy(original, from, copy, 0, Math.min(original.length - from, newLength));
 	    return copy;
 	}