Use append(character) rather than append(String).

git-svn-id: https://svn.apache.org/repos/asf/harmony/enhanced/classlib/trunk@909146 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/modules/nio/src/main/java/common/java/nio/channels/FileLock.java b/modules/nio/src/main/java/common/java/nio/channels/FileLock.java
index 1bc71a8..a69f035 100644
--- a/modules/nio/src/main/java/common/java/nio/channels/FileLock.java
+++ b/modules/nio/src/main/java/common/java/nio/channels/FileLock.java
@@ -202,7 +202,7 @@
         buffer.append(size);
         buffer.append(", shared=");
         buffer.append(Boolean.toString(shared));
-        buffer.append("]");
+        buffer.append(']');
         return buffer.toString();
     }
 }
diff --git a/modules/nio/src/test/java/common/org/apache/harmony/nio/tests/java/nio/channels/DatagramChannelTest.java b/modules/nio/src/test/java/common/org/apache/harmony/nio/tests/java/nio/channels/DatagramChannelTest.java
index 4a4b843..be9b17d 100644
--- a/modules/nio/src/test/java/common/org/apache/harmony/nio/tests/java/nio/channels/DatagramChannelTest.java
+++ b/modules/nio/src/test/java/common/org/apache/harmony/nio/tests/java/nio/channels/DatagramChannelTest.java
@@ -1382,7 +1382,7 @@
     public void testReceiveSend_8K() throws Exception {
         StringBuffer str8k = new StringBuffer();
         for (int i = 0; i < 8 * CAPACITY_1KB; i++) {
-            str8k.append("a");
+            str8k.append('a');
         }
         String str = str8k.toString();
         this.channel1.socket().bind(localAddr2);
@@ -1393,7 +1393,7 @@
     public void testReceiveSend_64K() throws Exception {
         StringBuffer str64k = new StringBuffer();
         for (int i = 0; i < CAPACITY_64KB; i++) {
-            str64k.append("a");
+            str64k.append('a');
         }
         String str = str64k.toString();
         try {