Fixing parsing of execArgs flag

[imsaravana369]

Description of the change

TODO

Checklist:

• [ ] Added the change to the "Unreleased" section of the changelog (where to add this?)
• [ x] Added some example of the new feature to the README
• [ ] Added a test for the contribution (if applicable) (will write one)

P.S.: the above checks are not compulsory to get a change merged, so you may skip them. However, taking care of them will result in less work for the maintainers and will be much appreciated 😊

[f-f]

Do we have any tests for this flag? If not, we should add one

[imsaravana369]

Do we have any tests for this flag? If not, we should add one

yeah will add tests

[imsaravana369]

Do we have any tests for this flag? If not, we should add one

Added testcases.