Add function to prove ada/Spark code

UltiSnips/markdown.snippets

@@ -52,3 +52,17 @@ endsnippet
 snippet ,m "Math equation" A
 \$$1\$ $0
 endsnippet
+
+snippet bookshelf "Tagline for bookshelf" b
+`!p
+if t[1] != "":
+	snip.rv = "[CW: "
+else:
+	snip.rv = ""`$1`!p
+if t[1] != "":
+	snip.rv = "]"
+else:
+	snip.rv = ""`
+${2:Title} by ${3:Author}
+${4:Description}
+endsnippet