My discovery was when using multiple lines with the text tool, as suggested by Suz Shook.
The text in the script editor had so many characters, and I didn’t know what they were. I googled and came to find out that they are Unicode characters. In the example, the u000D = “carriage return“… The u0027 = Apostrophe, and there are hundreds or more… I probably don’t need to know them, but I was curious.
The same thing with matrix, I don’t know and will probably continue not knowing.