Correct misspelled words

Correct some misspelled words:
responCe => responSe,
unkown => unkNown
infomation => infoRmation.

Change-Id: If0f8c2b71381be087694654969d7ea1483da7b17
diff --git a/tools/subunit-trace.py b/tools/subunit-trace.py
index c6f8eab..8ad59bb 100755
--- a/tools/subunit-trace.py
+++ b/tools/subunit-trace.py
@@ -263,7 +263,7 @@
     parser = argparse.ArgumentParser()
     parser.add_argument('--no-failure-debug', '-n', action='store_true',
                         dest='print_failures', help='Disable printing failure '
-                        'debug infomation in realtime')
+                        'debug information in realtime')
     parser.add_argument('--fails', '-f', action='store_true',
                         dest='post_fails', help='Print failure debug '
                         'information after the stream is proccesed')