swap unindent and unescape

Author: danini-the-panini

lib/src/tokenizer.dart

@@ -369,8 +369,8 @@ class KdlTokenizer {
             break;
           case '"':
             this.index += 1;
-            var string = _convertEscapes(this.buffer);
-            string = this.context == KdlTokenizerContext.multiLineString ? _unindent(string) : string;
+            var string = this.context == KdlTokenizerContext.multiLineString ? _unindent(this.buffer) : this.buffer;
+            string = _convertEscapes(string);
             return [KdlToken.STRING, string];
           case '':
             throw "Unterminated string literal";