I'm not the best programmer. I have a tendency to leave semicolons off when I'm debugging, so I can see what's happening in certain stages. I often then save and forget about it, and when I come back a week later, my code will print random variables to the screen which is very frustrating.
If you create a cell array with the string names of any .m files, this will then run mlint on the files you select and tell you which, if any, lines are missing semicolons.
I can't take credit for the method - one of my colleagues did something similar via the command window. I simply automated it because I'm lazy.