Output name of charset being asserted on

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/io/trunk@1718946 13f79535-47bb-0310-9956-ffa450edef68

Author: krosenvold

src/test/java/org/apache/commons/io/input/CharSequenceInputStreamTest.java

@@ -63,7 +63,7 @@ private void testBufferedRead(final String testString, final String charsetName)
                 final int bufferLength = random.nextInt(64);
                 int read = in.read(buffer, bufferOffset, bufferLength);
                 if (read == -1) {
-                    assertEquals("EOF: offset should equal length", expected.length, offset);
+                    assertEquals("EOF: offset should equal length for charset " + charsetName, expected.length, offset);
                     break;
                 } else {
                     assertTrue("Read " + read + " <= " + bufferLength, read <= bufferLength);