os << "\\tracking_changes " << convert<string>(trackChanges) << '\n'
<< "\\output_changes " << convert<string>(outputChanges) << '\n'
<< "\\html_math_output " << html_math_output << '\n'
- << "\\html_css_as_file" << html_css_as_file << '\n'
+ << "\\html_css_as_file " << html_css_as_file << '\n'
<< "\\html_be_strict " << convert<string>(html_be_strict) << '\n';
if (html_math_img_scale != 1.0)