Fix box and bbox snippets outside the first column

Author: mMontu

UltiSnips/all.snippets

@@ -78,21 +78,25 @@ endglobal
 snippet box "A nice box with the current comment symbol" b
 `!p
 box = make_box(len(t[1]))
-snip.rv = box[0] + '\n' + box[1]
+snip.rv = box[0]
+snip += box[1]
 `${1:content}`!p
 box = make_box(len(t[1]))
-snip.rv = box[2] + '\n' + box[3]`
+snip.rv = box[2]
+snip += box[3]`
 $0
 endsnippet
 
 snippet bbox "A nice box over the full width" b
 `!p
 width = int(vim.eval("&textwidth")) or 71
 box = make_box(len(t[1]), width)
-snip.rv = box[0] + '\n' + box[1]
+snip.rv = box[0]
+snip += box[1]
 `${1:content}`!p
 box = make_box(len(t[1]), width)
-snip.rv = box[2] + '\n' + box[3]`
+snip.rv = box[2]
+snip += box[3]`
 $0
 endsnippet