diff --git a/src/book/book.rs b/src/book/book.rs
index e4c631ef..b69e98ab 100644
--- a/src/book/book.rs
+++ b/src/book/book.rs
@@ -167,9 +167,9 @@ impl Chapter {
     ) -> Chapter {
         Chapter {
             name: name.to_string(),
-            content: content,
+            content,
             path: path.into(),
-            parent_names: parent_names,
+            parent_names,
             ..Default::default()
         }
     }
@@ -210,7 +210,7 @@ fn load_summary_item<P: AsRef<Path>>(
     match *item {
         SummaryItem::Separator => Ok(BookItem::Separator),
         SummaryItem::Link(ref link) => {
-            load_chapter(link, src_dir, parent_names).map(|c| BookItem::Chapter(c))
+            load_chapter(link, src_dir, parent_names).map(BookItem::Chapter)
         }
     }
 }
diff --git a/src/book/init.rs b/src/book/init.rs
index 202b3ec5..4acf4b52 100644
--- a/src/book/init.rs
+++ b/src/book/init.rs
@@ -175,7 +175,7 @@ impl BookBuilder {
         let summary = src_dir.join("SUMMARY.md");
         let mut f = File::create(&summary).chain_err(|| "Unable to create SUMMARY.md")?;
         writeln!(f, "# Summary")?;
-        writeln!(f, "")?;
+        writeln!(f)?;
         writeln!(f, "- [Chapter 1](./chapter_1.md)")?;
 
         let chapter_1 = src_dir.join("chapter_1.md");
diff --git a/src/book/mod.rs b/src/book/mod.rs
index 3ffbde6f..48537a37 100644
--- a/src/book/mod.rs
+++ b/src/book/mod.rs
@@ -20,8 +20,9 @@ use tempfile::Builder as TempFileBuilder;
 use toml::Value;
 
 use errors::*;
-use preprocess::{IndexPreprocessor, LinkPreprocessor, Preprocessor,
-    PreprocessorContext, CmdPreprocessor};
+use preprocess::{
+    CmdPreprocessor, IndexPreprocessor, LinkPreprocessor, Preprocessor, PreprocessorContext,
+};
 use renderer::{CmdRenderer, HtmlHandlebars, RenderContext, Renderer};
 use utils;
 
@@ -160,15 +161,16 @@ impl MDBook {
     /// Run the entire build process for a particular `Renderer`.
     fn execute_build_process(&self, renderer: &Renderer) -> Result<()> {
         let mut preprocessed_book = self.book.clone();
-        let preprocess_ctx = PreprocessorContext::new(self.root.clone(),
-                                     self.config.clone(),
-                                     renderer.name().to_string());
+        let preprocess_ctx = PreprocessorContext::new(
+            self.root.clone(),
+            self.config.clone(),
+            renderer.name().to_string(),
+        );
 
         for preprocessor in &self.preprocessors {
             if preprocessor_should_run(&**preprocessor, renderer, &self.config) {
                 debug!("Running the {} preprocessor.", preprocessor.name());
-                preprocessed_book =
-                    preprocessor.run(&preprocess_ctx, preprocessed_book)?;
+                preprocessed_book = preprocessor.run(&preprocess_ctx, preprocessed_book)?;
             }
         }
 
@@ -178,11 +180,7 @@ impl MDBook {
         Ok(())
     }
 
-    fn render(
-        &self,
-        preprocessed_book: &Book,
-        renderer: &Renderer,
-    ) -> Result<()> {
+    fn render(&self, preprocessed_book: &Book, renderer: &Renderer) -> Result<()> {
         let name = renderer.name();
         let build_dir = self.build_dir_for(name);
         if build_dir.exists() {
@@ -233,9 +231,8 @@ impl MDBook {
         let temp_dir = TempFileBuilder::new().prefix("mdbook-").tempdir()?;
 
         // FIXME: Is "test" the proper renderer name to use here?
-        let preprocess_context = PreprocessorContext::new(self.root.clone(),
-                                                          self.config.clone(),
-                                                          "test".to_string());
+        let preprocess_context =
+            PreprocessorContext::new(self.root.clone(), self.config.clone(), "test".to_string());
 
         let book = LinkPreprocessor::new().run(&preprocess_context, self.book.clone())?;
         // Index Preprocessor is disabled so that chapter paths continue to point to the
@@ -363,17 +360,11 @@ fn determine_preprocessors(config: &Config) -> Result<Vec<Box<Preprocessor>>> {
         preprocessors.extend(default_preprocessors());
     }
 
-    if let Some(preprocessor_table) =
-        config.get("preprocessor").and_then(|v| v.as_table())
-    {
+    if let Some(preprocessor_table) = config.get("preprocessor").and_then(|v| v.as_table()) {
         for key in preprocessor_table.keys() {
             match key.as_ref() {
-                "links" => {
-                    preprocessors.push(Box::new(LinkPreprocessor::new()))
-                }
-                "index" => {
-                    preprocessors.push(Box::new(IndexPreprocessor::new()))
-                }
+                "links" => preprocessors.push(Box::new(LinkPreprocessor::new())),
+                "index" => preprocessors.push(Box::new(IndexPreprocessor::new())),
                 name => preprocessors.push(interpret_custom_preprocessor(
                     name,
                     &preprocessor_table[name],
@@ -385,10 +376,7 @@ fn determine_preprocessors(config: &Config) -> Result<Vec<Box<Preprocessor>>> {
     Ok(preprocessors)
 }
 
-fn interpret_custom_preprocessor(
-    key: &str,
-    table: &Value,
-) -> Box<CmdPreprocessor> {
+fn interpret_custom_preprocessor(key: &str, table: &Value) -> Box<CmdPreprocessor> {
     let command = table
         .get("command")
         .and_then(|c| c.as_str())
@@ -406,8 +394,7 @@ fn interpret_custom_renderer(key: &str, table: &Value) -> Box<CmdRenderer> {
         .and_then(|c| c.as_str())
         .map(|s| s.to_string());
 
-    let command =
-        table_dot_command.unwrap_or_else(|| format!("mdbook-{}", key));
+    let command = table_dot_command.unwrap_or_else(|| format!("mdbook-{}", key));
 
     Box::new(CmdRenderer::new(key.to_string(), command.to_string()))
 }
@@ -428,7 +415,8 @@ fn preprocessor_should_run(preprocessor: &Preprocessor, renderer: &Renderer, cfg
     let renderer_name = renderer.name();
 
     if let Some(Value::Array(ref explicit_renderers)) = cfg.get(&key) {
-        return explicit_renderers.into_iter()
+        return explicit_renderers
+            .iter()
             .filter_map(|val| val.as_str())
             .any(|name| name == renderer_name);
     }
@@ -436,7 +424,6 @@ fn preprocessor_should_run(preprocessor: &Preprocessor, renderer: &Renderer, cfg
     preprocessor.supports_renderer(renderer_name)
 }
 
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -539,10 +526,7 @@ mod tests {
 
         // make sure the `preprocessor.random` table exists
         let random = cfg.get_preprocessor("random").unwrap();
-        let random = interpret_custom_preprocessor(
-            "random",
-            &Value::Table(random.clone()),
-        );
+        let random = interpret_custom_preprocessor("random", &Value::Table(random.clone()));
 
         assert_eq!(random.cmd(), "python random.py");
     }
@@ -557,7 +541,8 @@ mod tests {
         let cfg = Config::from_str(cfg_str).unwrap();
 
         // double-check that we can access preprocessor.links.renderers[0]
-        let html = cfg.get_preprocessor("links")
+        let html = cfg
+            .get_preprocessor("links")
             .and_then(|links| links.get("renderers"))
             .and_then(|renderers| renderers.as_array())
             .and_then(|renderers| renderers.get(0))
diff --git a/src/book/summary.rs b/src/book/summary.rs
index a7f73358..31bf0b9b 100644
--- a/src/book/summary.rs
+++ b/src/book/summary.rs
@@ -280,7 +280,7 @@ impl<'a> SummaryParser<'a> {
             Err(self.parse_error("You can't have an empty link."))
         } else {
             Ok(Link {
-                name: name,
+                name,
                 location: PathBuf::from(href.to_string()),
                 number: None,
                 nested_items: Vec::new(),
@@ -313,7 +313,6 @@ impl<'a> SummaryParser<'a> {
             root_items += bunch_of_items.len() as u32;
             items.extend(bunch_of_items);
 
-
             match self.next_event() {
                 Some(Event::Start(Tag::Paragraph)) => {
                     // we're starting the suffix chapters
@@ -732,7 +731,8 @@ mod tests {
     /// Ensure section numbers are correctly incremented after a horizontal separator.
     #[test]
     fn keep_numbering_after_separator() {
-        let src = "- [First](./first.md)\n---\n- [Second](./second.md)\n---\n- [Third](./third.md)\n";
+        let src =
+            "- [First](./first.md)\n---\n- [Second](./second.md)\n---\n- [Third](./third.md)\n";
         let should_be = vec![
             SummaryItem::Link(Link {
                 name: String::from("First"),
diff --git a/src/cmd/serve.rs b/src/cmd/serve.rs
index ba89c587..0fd88c3a 100644
--- a/src/cmd/serve.rs
+++ b/src/cmd/serve.rs
@@ -115,7 +115,7 @@ pub fn execute(args: &ArgMatches) -> Result<()> {
     }
 
     #[cfg(feature = "watch")]
-    watch::trigger_on_change(&mut book, move |path, book_dir| {
+    watch::trigger_on_change(&book, move |path, book_dir| {
         info!("File changed: {:?}", path);
         info!("Building book...");
 
diff --git a/src/config.rs b/src/config.rs
index 71591ace..c6b37094 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -301,8 +301,8 @@ impl<'de> Deserialize<'de> for Config {
             .unwrap_or_default();
 
         Ok(Config {
-            book: book,
-            build: build,
+            book,
+            build,
             rest: Value::Table(table),
         })
     }
@@ -444,7 +444,7 @@ pub struct HtmlConfig {
     pub search: Option<Search>,
     /// Git repository url. If `None`, the git button will not be shown.
     pub git_repository_url: Option<String>,
-    /// FontAwesome icon class to use for the Git repository link. 
+    /// FontAwesome icon class to use for the Git repository link.
     /// Defaults to `fa-github` if `None`.
     pub git_repository_icon: Option<String>,
 }
diff --git a/src/main.rs b/src/main.rs
index 86147532..dec89cf3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -20,8 +20,8 @@ use std::path::{Path, PathBuf};
 
 mod cmd;
 
-const NAME: &'static str = "mdBook";
-const VERSION: &'static str = concat!("v", crate_version!());
+const NAME: &str = "mdBook";
+const VERSION: &str = concat!("v", crate_version!());
 
 fn main() {
     init_logger();
diff --git a/src/preprocess/index.rs b/src/preprocess/index.rs
index 5560db54..a8818518 100644
--- a/src/preprocess/index.rs
+++ b/src/preprocess/index.rs
@@ -7,7 +7,7 @@ use super::{Preprocessor, PreprocessorContext};
 use book::{Book, BookItem};
 
 /// A preprocessor for converting file name `README.md` to `index.md` since
-/// `README.md` is the de facto index file in a markdown-based documentation.
+/// `README.md` is the de facto index file in markdown-based documentation.
 pub struct IndexPreprocessor;
 
 impl IndexPreprocessor {
diff --git a/src/preprocess/links.rs b/src/preprocess/links.rs
index 3403891a..90a057b0 100644
--- a/src/preprocess/links.rs
+++ b/src/preprocess/links.rs
@@ -69,12 +69,7 @@ where
             Ok(new_content) => {
                 if depth < MAX_LINK_NESTED_DEPTH {
                     if let Some(rel_path) = playpen.link.relative_path(path) {
-                        replaced.push_str(&replace_all(
-                            &new_content,
-                            rel_path,
-                            source,
-                            depth + 1,
-                        ));
+                        replaced.push_str(&replace_all(&new_content, rel_path, source, depth + 1));
                     } else {
                         replaced.push_str(&new_content);
                     }
@@ -118,18 +113,10 @@ impl<'a> LinkType<'a> {
         let base = base.as_ref();
         match self {
             LinkType::Escaped => None,
-            LinkType::IncludeRange(p, _) => {
-                Some(return_relative_path(base, &p))
-            }
-            LinkType::IncludeRangeFrom(p, _) => {
-                Some(return_relative_path(base, &p))
-            }
-            LinkType::IncludeRangeTo(p, _) => {
-                Some(return_relative_path(base, &p))
-            }
-            LinkType::IncludeRangeFull(p, _) => {
-                Some(return_relative_path(base, &p))
-            }
+            LinkType::IncludeRange(p, _) => Some(return_relative_path(base, &p)),
+            LinkType::IncludeRangeFrom(p, _) => Some(return_relative_path(base, &p)),
+            LinkType::IncludeRangeTo(p, _) => Some(return_relative_path(base, &p)),
+            LinkType::IncludeRangeFull(p, _) => Some(return_relative_path(base, &p)),
             LinkType::Playpen(p, _) => Some(return_relative_path(base, &p)),
         }
     }
@@ -155,27 +142,21 @@ fn parse_include_path(path: &str) -> LinkType<'static> {
     let end = end.and_then(|s| s.parse::<usize>().ok());
     match start {
         Some(start) => match end {
-            Some(end) => LinkType::IncludeRange(
-                path,
-                Range {
-                    start: start,
-                    end: end,
-                },
-            ),
+            Some(end) => LinkType::IncludeRange(path, Range { start, end }),
             None => if has_end {
-                LinkType::IncludeRangeFrom(path, RangeFrom { start: start })
+                LinkType::IncludeRangeFrom(path, RangeFrom { start })
             } else {
                 LinkType::IncludeRange(
                     path,
                     Range {
-                        start: start,
+                        start,
                         end: start + 1,
                     },
                 )
             },
         },
         None => match end {
-            Some(end) => LinkType::IncludeRangeTo(path, RangeTo { end: end }),
+            Some(end) => LinkType::IncludeRangeTo(path, RangeTo { end }),
             None => LinkType::IncludeRangeFull(path, RangeFull),
         },
     }
@@ -199,15 +180,11 @@ impl<'a> Link<'a> {
 
                 match (typ.as_str(), file_arg) {
                     ("include", Some(pth)) => Some(parse_include_path(pth)),
-                    ("playpen", Some(pth)) => {
-                        Some(LinkType::Playpen(pth.into(), props))
-                    }
+                    ("playpen", Some(pth)) => Some(LinkType::Playpen(pth.into(), props)),
                     _ => None,
                 }
             }
-            (Some(mat), None, None)
-                if mat.as_str().starts_with(ESCAPE_CHAR) =>
-            {
+            (Some(mat), None, None) if mat.as_str().starts_with(ESCAPE_CHAR) => {
                 Some(LinkType::Escaped)
             }
             _ => None,
@@ -258,7 +235,7 @@ impl<'a> Link<'a> {
                 let target = base.join(pat);
 
                 file_to_string(&target)
-                    .map(|s| take_lines(&s, range.clone()))
+                    .map(|s| take_lines(&s, *range))
                     .chain_err(|| {
                         format!(
                             "Could not read file for link {} ({})",
@@ -271,22 +248,23 @@ impl<'a> Link<'a> {
                 let target = base.join(pat);
 
                 file_to_string(&target).chain_err(|| {
-                    format!("Could not read file for link {} ({})",
-                            self.link_text,
-                            target.display())
+                    format!(
+                        "Could not read file for link {} ({})",
+                        self.link_text,
+                        target.display()
+                    )
                 })
             }
             LinkType::Playpen(ref pat, ref attrs) => {
                 let target = base.join(pat);
 
-                let contents =
-                file_to_string(&target).chain_err(|| {
-                        format!(
-                            "Could not read file for link {} ({})",
-                            self.link_text,
-                            target.display()
-                        )
-                    })?;
+                let contents = file_to_string(&target).chain_err(|| {
+                    format!(
+                        "Could not read file for link {} ({})",
+                        self.link_text,
+                        target.display()
+                    )
+                })?;
                 let ftype = if !attrs.is_empty() { "rust," } else { "rust" };
                 Ok(format!(
                     "```{}{}\n{}\n```\n",
@@ -531,10 +509,7 @@ mod tests {
                 Link {
                     start_index: 38,
                     end_index: 68,
-                    link: LinkType::Playpen(
-                        PathBuf::from("file.rs"),
-                        vec!["editable"]
-                    ),
+                    link: LinkType::Playpen(PathBuf::from("file.rs"), vec!["editable"]),
                     link_text: "{{#playpen file.rs editable }}",
                 },
                 Link {
@@ -544,8 +519,7 @@ mod tests {
                         PathBuf::from("my.rs"),
                         vec!["editable", "no_run", "should_panic"],
                     ),
-                    link_text:
-                        "{{#playpen my.rs editable no_run should_panic}}",
+                    link_text: "{{#playpen my.rs editable no_run should_panic}}",
                 },
             ]
         );
diff --git a/src/renderer/html_handlebars/hbs_renderer.rs b/src/renderer/html_handlebars/hbs_renderer.rs
index 6ef12f3c..f12fd168 100644
--- a/src/renderer/html_handlebars/hbs_renderer.rs
+++ b/src/renderer/html_handlebars/hbs_renderer.rs
@@ -30,75 +30,67 @@ impl HtmlHandlebars {
         print_content: &mut String,
     ) -> Result<()> {
         // FIXME: This should be made DRY-er and rely less on mutable state
-        match *item {
-            BookItem::Chapter(ref ch) => {
-                let content = ch.content.clone();
-                let content = utils::render_markdown(&content, ctx.html_config.curly_quotes);
-                print_content.push_str(&content);
+        if let BookItem::Chapter(ref ch) = *item {
+            let content = ch.content.clone();
+            let content = utils::render_markdown(&content, ctx.html_config.curly_quotes);
+            print_content.push_str(&content);
 
-                // Update the context with data for this file
-                let path = ch
-                    .path
-                    .to_str()
-                    .chain_err(|| "Could not convert path to str")?;
-                let filepath = Path::new(&ch.path).with_extension("html");
+            // Update the context with data for this file
+            let path = ch
+                .path
+                .to_str()
+                .chain_err(|| "Could not convert path to str")?;
+            let filepath = Path::new(&ch.path).with_extension("html");
 
-                // "print.html" is used for the print page.
-                if ch.path == Path::new("print.md") {
-                    bail!(ErrorKind::ReservedFilenameError(ch.path.clone()));
-                };
+            // "print.html" is used for the print page.
+            if ch.path == Path::new("print.md") {
+                bail!(ErrorKind::ReservedFilenameError(ch.path.clone()));
+            };
 
-                // Non-lexical lifetimes needed :'(
-                let title: String;
-                {
-                    let book_title = ctx
-                        .data
-                        .get("book_title")
-                        .and_then(serde_json::Value::as_str)
-                        .unwrap_or("");
-                    title = ch.name.clone() + " - " + book_title;
-                }
-
-                ctx.data.insert("path".to_owned(), json!(path));
-                ctx.data.insert("content".to_owned(), json!(content));
-                ctx.data.insert("chapter_title".to_owned(), json!(ch.name));
-                ctx.data.insert("title".to_owned(), json!(title));
-                ctx.data.insert(
-                    "path_to_root".to_owned(),
-                    json!(utils::fs::path_to_root(&ch.path)),
-                );
-
-                // Render the handlebars template with the data
-                debug!("Render template");
-                let rendered = ctx.handlebars.render("index", &ctx.data)?;
-
-                let rendered = self.post_process(rendered, &ctx.html_config.playpen);
-
-                // Write to file
-                debug!("Creating {}", filepath.display());
-                utils::fs::write_file(&ctx.destination, &filepath, rendered.as_bytes())?;
-
-                if ctx.is_index {
-                    ctx.data.insert("path".to_owned(), json!("index.html"));
-                    ctx.data.insert("path_to_root".to_owned(), json!(""));
-                    let rendered_index = ctx.handlebars.render("index", &ctx.data)?;
-                    let rendered_index =
-                        self.post_process(rendered_index, &ctx.html_config.playpen);
-                    debug!("Creating index.html from {}", path);
-                    utils::fs::write_file(
-                        &ctx.destination,
-                        "index.html",
-                        rendered_index.as_bytes(),
-                    )?;
-                }
+            // Non-lexical lifetimes needed :'(
+            let title: String;
+            {
+                let book_title = ctx
+                    .data
+                    .get("book_title")
+                    .and_then(serde_json::Value::as_str)
+                    .unwrap_or("");
+                title = ch.name.clone() + " - " + book_title;
+            }
+
+            ctx.data.insert("path".to_owned(), json!(path));
+            ctx.data.insert("content".to_owned(), json!(content));
+            ctx.data.insert("chapter_title".to_owned(), json!(ch.name));
+            ctx.data.insert("title".to_owned(), json!(title));
+            ctx.data.insert(
+                "path_to_root".to_owned(),
+                json!(utils::fs::path_to_root(&ch.path)),
+            );
+
+            // Render the handlebars template with the data
+            debug!("Render template");
+            let rendered = ctx.handlebars.render("index", &ctx.data)?;
+
+            let rendered = self.post_process(rendered, &ctx.html_config.playpen);
+
+            // Write to file
+            debug!("Creating {}", filepath.display());
+            utils::fs::write_file(&ctx.destination, &filepath, rendered.as_bytes())?;
+
+            if ctx.is_index {
+                ctx.data.insert("path".to_owned(), json!("index.html"));
+                ctx.data.insert("path_to_root".to_owned(), json!(""));
+                let rendered_index = ctx.handlebars.render("index", &ctx.data)?;
+                let rendered_index = self.post_process(rendered_index, &ctx.html_config.playpen);
+                debug!("Creating index.html from {}", path);
+                utils::fs::write_file(&ctx.destination, "index.html", rendered_index.as_bytes())?;
             }
-            _ => {}
         }
 
         Ok(())
     }
 
-    #[cfg_attr(feature = "cargo-clippy", allow(let_and_return))]
+    #[cfg_attr(feature = "cargo-clippy", allow(clippy::let_and_return))]
     fn post_process(&self, rendered: String, playpen_config: &Playpen) -> String {
         let rendered = build_header_links(&rendered);
         let rendered = fix_code_blocks(&rendered);
@@ -328,7 +320,7 @@ impl Renderer for HtmlHandlebars {
                 handlebars: &handlebars,
                 destination: destination.to_path_buf(),
                 data: data.clone(),
-                is_index: is_index,
+                is_index,
                 html_config: html_config.clone(),
             };
             self.render_item(item, ctx, &mut print_content)?;
diff --git a/src/renderer/html_handlebars/helpers/navigation.rs b/src/renderer/html_handlebars/helpers/navigation.rs
index dc84d0da..0e551004 100644
--- a/src/renderer/html_handlebars/helpers/navigation.rs
+++ b/src/renderer/html_handlebars/helpers/navigation.rs
@@ -18,13 +18,13 @@ impl Target {
     /// Returns target if found.
     fn find(
         &self,
-        base_path: &String,
-        current_path: &String,
+        base_path: &str,
+        current_path: &str,
         current_item: &StringMap,
         previous_item: &StringMap,
     ) -> Result<Option<StringMap>, RenderError> {
-        match self {
-            &Target::Next => {
+        match *self {
+            Target::Next => {
                 let previous_path = previous_item
                     .get("path")
                     .ok_or_else(|| RenderError::new("No path found for chapter in JSON data"))?;
@@ -34,7 +34,7 @@ impl Target {
                 }
             }
 
-            &Target::Previous => {
+            Target::Previous => {
                 if current_path == base_path {
                     return Ok(Some(previous_item.clone()));
                 }
diff --git a/src/renderer/html_handlebars/search.rs b/src/renderer/html_handlebars/search.rs
index fd055f38..c27977e1 100644
--- a/src/renderer/html_handlebars/search.rs
+++ b/src/renderer/html_handlebars/search.rs
@@ -54,7 +54,7 @@ fn add_doc(
     section_id: &Option<String>,
     items: &[&str],
 ) {
-    let url = if let &Some(ref id) = section_id {
+    let url = if let Some(ref id) = *section_id {
         Cow::Owned(format!("{}#{}", anchor_base, id))
     } else {
         Cow::Borrowed(anchor_base)
@@ -74,8 +74,8 @@ fn render_item(
     doc_urls: &mut Vec<String>,
     item: &BookItem,
 ) -> Result<()> {
-    let chapter = match item {
-        &BookItem::Chapter(ref ch) => ch,
+    let chapter = match *item {
+        BookItem::Chapter(ref ch) => ch,
         _ => return Ok(()),
     };
 
@@ -101,7 +101,7 @@ fn render_item(
     for event in p {
         match event {
             Event::Start(Tag::Header(i)) if i <= max_section_depth => {
-                if heading.len() > 0 {
+                if !heading.is_empty() {
                     // Section finished, the next header is following now
                     // Write the data to the index, and clear it for the next section
                     add_doc(
@@ -155,7 +155,7 @@ fn render_item(
         }
     }
 
-    if heading.len() > 0 {
+    if !heading.is_empty() {
         // Make sure the last section is added to the index
         add_doc(
             index,
diff --git a/src/renderer/mod.rs b/src/renderer/mod.rs
index bf5f59c5..ae26c6ac 100644
--- a/src/renderer/mod.rs
+++ b/src/renderer/mod.rs
@@ -76,8 +76,8 @@ impl RenderContext {
         Q: Into<PathBuf>,
     {
         RenderContext {
-            book: book,
-            config: config,
+            book,
+            config,
             version: ::MDBOOK_VERSION.to_string(),
             root: root.into(),
             destination: destination.into(),
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
index 73015f5a..31abe98c 100644
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -119,7 +119,7 @@ struct EventQuoteConverter {
 impl EventQuoteConverter {
     fn new(enabled: bool) -> Self {
         EventQuoteConverter {
-            enabled: enabled,
+            enabled,
             convert_text: true,
         }
     }
@@ -324,14 +324,8 @@ more text with spaces
                 id_from_content("## Method-call expressions"),
                 "method-call-expressions"
             );
-            assert_eq!(
-                id_from_content("## **Bold** title"),
-                "bold-title"
-            );
-            assert_eq!(
-                id_from_content("## `Code` title"),
-                "code-title"
-            );
+            assert_eq!(id_from_content("## **Bold** title"), "bold-title");
+            assert_eq!(id_from_content("## `Code` title"), "code-title");
         }
 
         #[test]
@@ -344,10 +338,7 @@ more text with spaces
                 id_from_content("## 中文標題 CJK title"),
                 "中文標題-cjk-title"
             );
-            assert_eq!(
-                id_from_content("## Über"),
-                "Über"
-            );
+            assert_eq!(id_from_content("## Über"), "Über");
         }
 
         #[test]