Have you ever made a trade with somebody but the only option is to copy and past the names of the cards into a list?
You probably ended up with something that looked like this
1995 Topps 12 15 36 37 39 112 666 1997 Fleer 1 77 78 444 512 1997 topps 22 23 24 27 32 35 37 38 41 43 44 45 1999 Ultra 223 230 235
By adding a space after each line, then adding "<br>" (don't use the quotes), your list will come out like this
1995 Topps 12 15 36 37 39 112 666
1997 Fleer 1 77 78 444 512
1997 topps 22 23 24 27 32 35 37 38 41 43 44 45
1999 Ultra 223 230 235
Sample: (Don't use the quotes when doing this)
"1995 Topps 12 15 36 37 39 112 666 <br>"
"1997 Fleer 1 77 78 444 512 <br>"