Function rustdocify 

pub fn rustdocify(
    readme: &str,
    package_name: &str,
    version: Option<&str>,
    crate_name: Option<&str>,
) -> Result<String, Error>

Rustdocifies the given readme.

• Removes top-level header.
• Changes other headers to be one level higher.
• Converts docs.rs links of given package_name to rustdoc format.
• Doesn’t change anything within code blocks.
• If version is given, checks that links have this exact version.
• If crate_name is given, checks that links have this exact crate name, if any.

See crate index for an example and more details.