`@w` and comments

[texinfo.tex version 2026-07-04.10]

Consider this example.

```
\input texinfo

foo @w{@c
bar}

@bye
```

Compiling with `texi2pdf` aborts with

```
Argument of @cxxx has an extra }.
<inserted text> 
                @par 
<to be read again> 
                   }
l.4 bar}
```

Is this expected?


    Werner