Do not count the trailing newline char when checking for the line length

As a simple test, use the first line of this commit. It should report 72
characters.
Merge pull request #21 from mudrd8mz/commit-message-first-line

Do not count the trailing newline char when checking for the line length
Revert "MDLSITE-3413 ci: get rid of last comment date"

This reverts commit 8cc1e0c84bedd7d5ffcac3e87d1945e2e82bb168.