Fix clippy.

src/intermediate/src_block.rs

@@ -77,7 +77,7 @@ intermediate!(
             .collect();
         let language = original.language.map(str::to_owned);
 
-        match language.as_ref().map(String::as_str) {
+        match language.as_deref() {
             Some(lang @ "bash") => {
                 let highlighted = highlight_bash(&lines);
                 if let Ok(highlighted) = highlighted {
@@ -151,7 +151,7 @@ where
     std::string::String: for<'a> From<&'a L>,
 {
     Ok(lines
-        .into_iter()
+        .iter()
         .map(|l| {
             let mut line = ISrcLine::new();
             line.children.push(ISrcSegment::RawText(l.into()));