My configuration automatically tweets new articles. As a test, I saved a (K2) article with the title "Testing social rebroadcast. Are we tweeting & posting to Facebook?". The tweet which resulted had the text "Testing social rebroadcast. Are we tweeting & posting to Facebook?" The attached screen shot shows the resulting tweet.
First, many thanks for the rapid response. Second, the code change has been installed and seems to be working as it should. I'll revert back to you if there are any issues.