Codespell fixes

Spelling errors found using github.com/lucasdemarchi/codespell
A tool to fix common misspellings.
This tool is licensed under GNU General Public License, version 2.

Change-Id: I2cf277da6cc16322eff8adaba83e1ea98dd4cb41
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/lib/utilities.py b/lib/utilities.py
index ae3ad24..dd7da09 100755
--- a/lib/utilities.py
+++ b/lib/utilities.py
@@ -161,7 +161,7 @@
     host   The DNS name or IP address to be passed to the mtr command.
     """
 
-    # Run the mtr command.  Exlude the header line.  Trim leading space from
+    # Run the mtr command.  Exclude the header line.  Trim leading space from
     # each line.  Change all multiple spaces delims to single space delims.
     cmd_buf = "mtr --report " + host +\
         " | tail -n +2 | sed -r -e 's/^[ ]+//g' -e 's/[ ]+/ /g'"