diff --git a/src/main/java/org/apache/commons/fileupload/util/mime/QuotedPrintableDecoder.java b/src/main/java/org/apache/commons/fileupload/util/mime/QuotedPrintableDecoder.java
index 89b64d0..f071532 100644
--- a/src/main/java/org/apache/commons/fileupload/util/mime/QuotedPrintableDecoder.java
+++ b/src/main/java/org/apache/commons/fileupload/util/mime/QuotedPrintableDecoder.java
@@ -95,7 +95,7 @@
 
     /**
      * Convert a hex digit to the binary value it represents.
-     * 
+     *
      * @param b the ascii hex byte to convert (0-0, A-F, a-f)
      * @return the int value of the hex byte, 0-15
      * @throws IOException if the byte is not a valid hex digit.