Recursive macros and @html

[Jesper Harder]

Suppose that we define a subscript macro for HTML:

  @rmacro sub {arg}
  @html
  <sub>\arg\</sub>
  @end html
  @end rmacro

If it's used recursively

  address@hidden@sub{a}}

you get

  C<sub>1<sub>a</sub>
  &lt;/sub&gt;

It would be nice if it worked.

Another problem is that @html ... @end html forces a newline, which
means that you can't use it inside an @example environment.