readline: keep tab completions visible with multiline prompts

Author: Han5991

lib/internal/readline/interface.js

@@ -780,6 +780,9 @@ class Interface extends InterfaceConstructor {
       output += '\r\n\r\n';
     }
     this[kWriteToOutput](output);
+    if (StringPrototypeIncludes(this[kPrompt], '\n') || this[kIsMultiline]) {
+      this.prevRows = 0;
+    }
     this[kRefreshLine]();
   }