Some app windows in OS X shorten entries in listings because they won’t fit in otherwise. Usually a bit is chopped out of the middle and ellipses put in its place. Take a look at this screen grab of Disk Utility for an example:
You can try resizing the window if your monitor is big enough but a quicker and easier way to view the whole of any entry in the list is to select it and tap Cmd+C to copy it. Then open a text editor like TextEdit, and tap Cmd+V to paste. The text from the list will be pasted in.
Neat, eh? It’s little details like this that you simply don’t find in other operating systems, and is why I love Apple software.