Changed a concat to a format.

diff --git a/Frame.lua b/Frame.lua
index a409e1a..78247b6 100644
--- a/Frame.lua
+++ b/Frame.lua
@@ -2253,7 +2253,7 @@ do
 						local recipe_string = has_faction and recipe_entry.name or string.format("[%s] %s", _G.REPUTATION, recipe_entry.name)

 						if exclusions[recipe_index] then
-							recipe_string = "** " .. recipe_string .. " **"
+							recipe_string = string.format("** %s **", recipe_string)
 						end
 						local recipe_level = recipe_entry.skill_level