Refactor code-style

Author: wooorm

src/configuration.rs

@@ -553,6 +553,8 @@ pub struct CompileOptions {
     /// ```
     pub allow_dangerous_protocol: bool,
 
+    // To do: `doc_markdown` is broken.
+    #[allow(clippy::doc_markdown)]
     /// Default line ending to use when compiling to HTML, for line endings not
     /// in `value`.
     ///

src/event.rs

@@ -3266,7 +3266,7 @@ pub enum Name {
     ///                 ^
     /// ```
     ResourceTitleString,
-    /// SpaceOrTab.
+    /// Space or tab.
     ///
     /// ## Info
     ///

src/mdast.rs

@@ -224,6 +224,8 @@ fn children_to_string(children: &[Node]) -> String {
     children.iter().map(ToString::to_string).collect()
 }
 
+// To do: clippy may be right but that’s a breaking change.
+#[allow(clippy::to_string_trait_impl)]
 impl ToString for Node {
     fn to_string(&self) -> String {
         match self {

src/to_mdast.rs

@@ -1280,7 +1280,7 @@ fn on_exit_label_text(context: &mut CompileContext) {
         .media_reference_stack
         .last_mut()
         .expect("expected reference on media stack");
-    reference.label = label.clone();
+    reference.label.clone_from(&label);
     reference.identifier = identifier;
 
     match context.tail_mut() {