diff --git a/bin/generate-book/src/main.rs b/bin/generate-book/src/main.rs
index 4dc9cac..bb05954 100644
--- a/bin/generate-book/src/main.rs
+++ b/bin/generate-book/src/main.rs
@@ -1,7 +1,7 @@
 use {
   pulldown_cmark::{CowStr, Event, HeadingLevel, Options, Parser, Tag},
   pulldown_cmark_to_cmark::cmark,
-  std::{collections::BTreeMap, error::Error, fs, ops::Deref},
+  std::{collections::BTreeMap, error::Error, fmt::Write, fs, ops::Deref},
 };
 
 type Result<T = ()> = std::result::Result<T, Box<dyn Error>>;
@@ -174,12 +174,13 @@ fn main() -> Result {
         HeadingLevel::H5 => 4,
         HeadingLevel::H6 => 5,
       };
-      summary.push_str(&format!(
-        "{}- [{}](chapter_{}.md)\n",
+      writeln!(
+        summary,
+        "{}- [{}](chapter_{}.md)",
         " ".repeat(indent * 4),
         chapter.title(),
         chapter.number()
-      ));
+      )?;
     }
 
     fs::write(format!("{}/SUMMARY.md", src), summary).unwrap();
diff --git a/src/color_display.rs b/src/color_display.rs
index 4729621..384a724 100644
--- a/src/color_display.rs
+++ b/src/color_display.rs
@@ -1,7 +1,7 @@
 use super::*;
 
 pub(crate) trait ColorDisplay {
-  fn color_display<'a>(&'a self, color: Color) -> Wrapper<'a>
+  fn color_display(&self, color: Color) -> Wrapper
   where
     Self: Sized,
   {
diff --git a/src/config.rs b/src/config.rs
index 2a1085f..f27b98e 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -605,7 +605,7 @@ impl Config {
     }
   }
 
-  pub(crate) fn run<'src>(self, loader: &'src Loader) -> Result<(), Error<'src>> {
+  pub(crate) fn run(self, loader: &Loader) -> Result<(), Error> {
     if let Err(error) = InterruptHandler::install(self.verbosity) {
       warn!("Failed to set CTRL-C handler: {}", error);
     }
diff --git a/src/lib.rs b/src/lib.rs
index 667e04b..4aa7ead 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,11 +1,8 @@
 #![deny(clippy::all, clippy::pedantic)]
 #![allow(
   clippy::doc_markdown,
-  clippy::empty_enum,
   clippy::enum_glob_use,
-  clippy::if_not_else,
   clippy::missing_errors_doc,
-  clippy::needless_lifetimes,
   clippy::needless_pass_by_value,
   clippy::non_ascii_literal,
   clippy::shadow_unrelated,
diff --git a/src/parser.rs b/src/parser.rs
index cb197e0..ac6324e 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -179,14 +179,14 @@ impl<'tokens, 'src> Parser<'tokens, 'src> {
         "Presumed next token would have kind {}, but found {}",
         Identifier, next.kind
       ))?)
-    } else if keyword != next.lexeme() {
+    } else if keyword == next.lexeme() {
+      Ok(())
+    } else {
       Err(self.internal_error(format!(
         "Presumed next token would have lexeme \"{}\", but found \"{}\"",
         keyword,
         next.lexeme(),
       ))?)
-    } else {
-      Ok(())
     }
   }
 
@@ -194,27 +194,27 @@ impl<'tokens, 'src> Parser<'tokens, 'src> {
   fn presume(&mut self, kind: TokenKind) -> CompileResult<'src, Token<'src>> {
     let next = self.advance()?;
 
-    if next.kind != kind {
+    if next.kind == kind {
+      Ok(next)
+    } else {
       Err(self.internal_error(format!(
         "Presumed next token would have kind {:?}, but found {:?}",
         kind, next.kind
       ))?)
-    } else {
-      Ok(next)
     }
   }
 
   /// Return an internal error if the next token is not one of kinds `kinds`.
   fn presume_any(&mut self, kinds: &[TokenKind]) -> CompileResult<'src, Token<'src>> {
     let next = self.advance()?;
-    if !kinds.contains(&next.kind) {
+    if kinds.contains(&next.kind) {
+      Ok(next)
+    } else {
       Err(self.internal_error(format!(
         "Presumed next token would be {}, but found {}",
         List::or(kinds),
         next.kind
       ))?)
-    } else {
-      Ok(next)
     }
   }
 
@@ -357,16 +357,16 @@ impl<'tokens, 'src> Parser<'tokens, 'src> {
       }
     }
 
-    if self.next != self.tokens.len() {
-      Err(self.internal_error(format!(
-        "Parse completed with {} unparsed tokens",
-        self.tokens.len() - self.next,
-      ))?)
-    } else {
+    if self.next == self.tokens.len() {
       Ok(Ast {
         warnings: Vec::new(),
         items,
       })
+    } else {
+      Err(self.internal_error(format!(
+        "Parse completed with {} unparsed tokens",
+        self.tokens.len() - self.next,
+      ))?)
     }
   }
 
diff --git a/src/positional.rs b/src/positional.rs
index 79b318e..a74a474 100644
--- a/src/positional.rs
+++ b/src/positional.rs
@@ -26,7 +26,7 @@ use super::*;
 ///
 /// For modes that do take other arguments, the search argument is simply
 /// prepended to rest.
-#[cfg_attr(test, derive(PartialEq, Debug))]
+#[cfg_attr(test, derive(PartialEq, Eq, Debug))]
 pub struct Positional {
   /// Overrides from values of the form `[a-zA-Z_][a-zA-Z0-9_-]*=.*`
   pub overrides: Vec<(String, String)>,
diff --git a/src/subcommand.rs b/src/subcommand.rs
index 60ab95c..7174f36 100644
--- a/src/subcommand.rs
+++ b/src/subcommand.rs
@@ -356,7 +356,9 @@ impl Subcommand {
     let formatted = ast.to_string();
 
     if config.check {
-      return if formatted != src {
+      return if formatted == src {
+        Ok(())
+      } else {
         use similar::{ChangeTag, TextDiff};
 
         let diff = TextDiff::configure()
@@ -376,8 +378,6 @@ impl Subcommand {
         }
 
         Err(Error::FormatCheckFoundDiff)
-      } else {
-        Ok(())
       };
     }
 
@@ -421,11 +421,11 @@ impl Subcommand {
         continue;
       }
 
-      if !recipe_aliases.contains_key(alias.target.name.lexeme()) {
-        recipe_aliases.insert(alias.target.name.lexeme(), vec![alias.name.lexeme()]);
-      } else {
+      if recipe_aliases.contains_key(alias.target.name.lexeme()) {
         let aliases = recipe_aliases.get_mut(alias.target.name.lexeme()).unwrap();
         aliases.push(alias.name.lexeme());
+      } else {
+        recipe_aliases.insert(alias.target.name.lexeme(), vec![alias.name.lexeme()]);
       }
     }