Make sure we don't pass short 8.3 path to latex on Windows (bug #62779). * latex-text-renderer.cc (latex_renderer::write_tex_file): On Windows, use canonicalized path of temporary directory.

## script_nest.m
function x = script_nest
  A (5)
  function A (n)
    if (n <= 0)
      script_nest_script;
    else
      A (n - 1);
    endif
  endfunction
endfunction