Probably not, as those are two different things though. (although I can think of one situation were it might be related: emoticons)
Using the proper '/command' syntax is more so you wont run into troubles later on. It is not good when you learn how to make scripts and do it immediatly with bad practices. It's better to learn it in the correct way from the start. It would make scripting (and looking for errors, etc) much easier...
As for the blue line: can you post a screenshot?