'...' are very usefull. Basically, it makes it clear that it is one file instead of multiple. Lets say you have a file called
foo bar. If you want to edit the file, you would use nano. So
nano foo bar. But we have a problem: nano is now going to search for a file called
foo and a file called
bar. We don't want that! So we're going to need to put quotes around it to say "hey, you aren't supposed to look for two files. This is one file!" Everything between
"..." will be seen as one file, no matter how many spaces are between the words inside.
nano foo bar test will make nano search for the files
test. But if we do this:
nano foo "bar test", it is going to search for the files
bar test. Or in your case: instead of searching for
1, you want to search for
Untitled Document 1, so you need to quote it.
There is a difference between
'...', but you'd first need to learn about variables and how to call them. So that isn't important. When doing what you want to do, I advice using