<Space> is lost while joining a list to string
Please note that you can use the action "Pad Text" to add white space characters in front of some text.
In your case the action would look something like the following.
I hope this makes sense.
I've found the easier way: just replaced the right space in list item 1 with %" "%
P.S. Looks like there's some problems with topic description formatting (it removes line breaks and everything looking like html tag)