Improve handling of caret-notation character escapes in text literals

Author: cirras

delphi-frontend/src/main/java/au/com/integradev/delphi/antlr/ast/node/TextLiteralNodeImpl.java

@@ -139,7 +139,7 @@ private String createSingleLineValue() {
           break;
 
         case ESCAPED_CHARACTER:
-          imageBuilder.append(child.getImage());
+          imageBuilder.append((char) ((child.getImage().charAt(0) + 64) % 128));
           break;
 
         default: