Deprecated stcatv and add stcatn

[ben-grande]

Deprecate stcatv:

• The 'M-' and '^' notation were not covering all unicode codepoints, issue is present in cat from coreutils also.

Add stcatn:

• Printing data without ending with a newline can lead to problems on the terminal and also how the file is read by another problem later. Add a newline at the end of each file that does not have one.
• Trailing whitespace is trimmed from each line.

This pull request changes...

Changes

Mandatory Checklist

• Legal agreements accepted. By contributing to this organisation, you acknowledge you have read, understood, and agree to be bound by these these agreements:

Terms of Service, Privacy Policy, Cookie Policy, E-Sign Consent, DMCA, Imprint

Optional Checklist

The following items are optional but might be requested in certain cases.

• I have tested it locally
• I have reviewed and updated any documentation if relevant
• I am providing new code and test(s) for it

Fixes #

Fixes: #22
Fixes: #21
Fixes: #20