* Added spell check
* All words
* Add a missing word
* Fix header checks
* Fix header checks v1
* Fix header check v2
* Updated freertos link in header
* Fixed afr link in the header
* Fix last of header checks
* Update the spell check script to check amazon licensed files only
* Fixed paths and added comments
* Try with modified repo
* Add inplace substitute option to sed
* Use official repo as the spell checker source
* Add vendor file to the ignored list
Co-authored-by: root <root@ip-172-31-5-28.us-west-2.compute.internal>
* Added event_groups.c Unit Test.
* Formatted and more comments.
* Formatted
* Split some test cases and add comment and coverage tag.
* Update test cases.
* Remove xEventGroupDelete Invalid Input test case, since the implementation does not handle this.