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: I13bbeeb8f1467efc1cf8748e1a66343e879dfc8a
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/syslib/utils_os.robot b/syslib/utils_os.robot
index 44521b4..e358e9f 100755
--- a/syslib/utils_os.robot
+++ b/syslib/utils_os.robot
@@ -363,7 +363,7 @@
     [Return]  ${output}
 
 Verify JSON String
-    [Documentation]  Ensure the JSON string content is seperated by commas.
+    [Documentation]  Ensure the JSON string content is separated by commas.
     [Arguments]  ${unver_string}
     # Description of argument(s):
     # unver_string  JSON String we will be checking for lshw comma errors.