<burrbull[m]> "Looks like double backslash is..." <- > <@burrbull:matrix.org> Looks like double backslash is needed:
> 
> ```yaml
>   _expand_array:
>     "KEY\\[%s\\]": {}
> ```
> First for YAML parser and second for name matcher
> 
> or in this particular case just
> 
> ```yaml
>   _expand_array:
>     KEY*: {}
> ```

Thank you!  I had tried single backslash which did not work, and would never have dreamed of double backslash!  Thank you again.