Describe your changes

Please refer to an issue here or describe the change thoroughly in your PR.

What is your pull request about?

Bug fix
Improvement
New feature (adds functionality)
Breaking change (bug fix, feature or improvement that would cause existing functionality to not work as expected)
Typo fix
Documentation update
Update of other files

For the main program: My edits contain no tabs, indentation is five spaces and any line endings do not contain any blank chars
I've read CONTRIBUTING.md and Coding_Convention.md
I have tested this fix or improvement against >=2 hosts and I couldn't spot a problem
I have tested this new feature against >=2 hosts which show this feature and >=2 host which does not (in order to avoid side effects) . I couldn't spot a problem
For the new feature I have made corresponding changes to the documentation and / or to help()
If it's a bigger change: I added myself to CREDITS.md (alphabetical order) and the change to CHANGELOG.md