Spelling 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: I99ddfba10e88b764554107ac6859502ef09c6234
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/tools/generate_test_document b/tools/generate_test_document
index ef510c7..452208e 100755
--- a/tools/generate_test_document
+++ b/tools/generate_test_document
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# This program will generate test documenation from the robot test cases.
+# This program will generate test documentation from the robot test cases.
 
 # Description of argument(s):
 # test_dir_path            Test directory where robot test cases are available.