Make unquote unescape formerly-captured quotemarks

src/vm/commands/quote.ts

@@ -16,6 +16,7 @@ export const stripQuotemarkLayer = (s: string, marks?: string[]): string => {
         }
 
         s = s.substring(mark.length, s.length - mark.length)
+        s = s.replaceAll(`\\${mark}`, mark)
         break
     }