pub fn highlighted_html_for_file<P: AsRef<Path>>(
    path: P,
    ss: &SyntaxSet,
    theme: &Theme,
) -> Result<String, Error>Expand description
Convenience method that combines start_highlighted_html_snippet, styled_line_to_highlighted_html
and HighlightFile from syntect::easy to create a full highlighted HTML snippet for
a file.
Note that the syntax passed in must be from a SyntaxSet compiled for newline characters.
This is easy to get with SyntaxSet::load_defaults_newlines(). (Note: this was different before v3.0)