Comment typo.
MODIFY
src/main/java/org/apache/commons/io/FileSystemUtils.java
src/main/java/org/apache/commons/io/FileSystemUtils.java
@@ -507,7 +507,7 @@ long parseBytes(final String freeSpace, final String path) throws IOException {
ThreadMonitor.stop(monitor);
if (proc.exitValue() != 0) {
- // os command problem, throw exception
+ // OS command problem, throw exception
throw new IOException(
"Command line returned OS error code '" + proc.exitValue() +
"' for command " + Arrays.asList(cmdAttribs));

Comment typo.