You get that from excel, I assume. When I bring anything in from excel, I create a new tab in excel, set each cell with =TRIM('tabname'!cellname(A1)), that way all extra stuff is not there when I copy it. Might or might not work, but that's what I do. Then I don't have to worry about it in autocad. Another thing that tends to happen is empty cells sometimes have spaces in them and they come up as ghosted images in autocad that you can't get rid of by selection. My solution takes care of that from happening.