Fix documentatin for system command

Signed-off-by: Martin J. Bligh <mbligh@google.com>



git-svn-id: http://test.kernel.org/svn/autotest/trunk@4180 592f7852-d20e-0410-864c-8624ca9c26a4
diff --git a/client/common_lib/utils.py b/client/common_lib/utils.py
index bda72e2..12e66c6 100644
--- a/client/common_lib/utils.py
+++ b/client/common_lib/utils.py
@@ -613,7 +613,17 @@
 
 
 def system(command, timeout=None, ignore_status=False):
-    """This function returns the exit status of command."""
+    """
+    Run a command
+
+    @param timeout: timeout in seconds
+    @param ignore_status: if ignore_status=False, throw an exception if the
+            command's exit code is non-zero
+            if ignore_stauts=True, return the exit code.
+    
+    @return exit status of command
+            (note, this will always be zero unless ignore_status=True)
+    """
     return run(command, timeout=timeout, ignore_status=ignore_status,
                stdout_tee=TEE_TO_LOGS, stderr_tee=TEE_TO_LOGS).exit_status