fix formatting in Using S.B.B. in Your Proj.

Using-Smouldering-Beach-Ball-in-Your-Project.md

@@ -8,11 +8,11 @@ For now, I will not go into detail on what the specifications look like. Instead
 
 ```f#
 let ``draw-image`` imgWidth imgHeight mainColour oColour oType path =
-	try	
-		// Assume "buildSpec" is the abstracted version of step 1 above.
-		buildSpec imgWidth imgHeight mainColour oColour oType path
-		|> makeImage
-		|> Async.RunSynchronously
+	try
+            // Assume "buildSpec" is the abstracted version of step 1 above.
+	    buildSpec imgWidth imgHeight mainColour oColour oType path
+            |> makeImage
+	    |> Async.RunSynchronously
 	with
 	| :? ArgumentException as ex -> ex.Message
 	| _ as ex -> ex.Message