Typo

Author: sebbASF

src/main/java/org/apache/commons/io/FileSystem.java

@@ -35,7 +35,7 @@ public enum FileSystem {
     LINUX(255, 4096, new char[] {
             // KEEP THIS ARRAY SORTED!
             // @formatter:off
-            // ASCII NULL
+            // ASCII NUL
             0,
              '/'
             // @formatter:on
@@ -44,7 +44,7 @@ public enum FileSystem {
     MAC_OSX(255, 1024, new char[] {
             // KEEP THIS ARRAY SORTED!
             // @formatter:off
-            // ASCII NULL
+            // ASCII NUL
             0,
             '/',
              ':'
@@ -56,7 +56,7 @@ public enum FileSystem {
     WINDOWS(255, 32000, new char[] {
             // KEEP THIS ARRAY SORTED!
             // @formatter:off
-            // ASCII NULL
+            // ASCII NUL
             0,
             // 1-31 may be allowed in file streams
             1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28,