Simplyfy open_tag handling

Author: chojs23

src/librustdoc/html/render/mod.rs

@@ -2929,11 +2929,10 @@ pub(super) fn render_attributes_in_code_with_options(
     open_tag: Option<&str>,
 ) -> Result<bool, fmt::Error> {
     let mut wrote_any = false;
+    let open_tag = open_tag.unwrap_or("");
     let mut render_attr = |attr: &str| -> fmt::Result {
         if !wrote_any {
-            if let Some(open_tag) = open_tag {
-                w.write_str(open_tag)?;
-            }
+            w.write_str(open_tag)?;
             wrote_any = true;
         }
         render_code_attribute(prefix, attr, w)