check_html_root_url: use parse_file to handle files with #!

Author: mgeisler

src/html_root_url.rs

@@ -72,7 +72,7 @@ pub fn check_html_root_url(path: &str, pkg_name: &str, pkg_version: &str) -> Res
     let code = read_file(path).map_err(|err| format!("could not read {}: {}", path, err))?;
     let version = parse_version(pkg_version)
         .map_err(|err| format!("bad package version {:?}: {}", pkg_version, err))?;
-    let krate: syn::File = syn::parse_str(&code)
+    let krate: syn::File = syn::parse_file(&code)
         .map_err(|_| format!("could not parse {}: please run \"cargo build\"", path))?;
 
     println!("Checking doc attributes in {}...", path);