fix: escape characters as octal sequences

test/Main.hs

@@ -6,8 +6,9 @@ module Main (main) where
 
 import Language.QBE
 
-import Test.Tasty (TestTree, defaultMain, testGroup)
+import Test.Tasty (TestTree, testGroup)
 import Test.Tasty.Silver (goldenVsAction)
+import Test.Tasty.Silver.Interactive (defaultMain)
 import System.FilePath ((</>), (<.>))
 import Prettyprinter (Pretty(pretty), layoutPretty, defaultLayoutOptions)
 import Prettyprinter.Render.Text (renderStrict)