diff --git a/src/cli/error.rs b/src/cli/error.rs
index 7ab0130..929650a 100644
--- a/src/cli/error.rs
+++ b/src/cli/error.rs
@@ -45,8 +45,8 @@ where
             Error::Eval(e) => e.eprint(files, config),
             Error::ArgumentParse { file, error } => error.eprint(file, config),
             Error::ArgumentEval { file, error } => error.eprint(file, config),
-            Error::NoSuchEntry(n) => eprintln!("No entry with number {}", n),
-            Error::NoSuchLog(date) => eprintln!("No log for {}", date),
+            Error::NoSuchEntry(n) => eprintln!("No entry with number {n}"),
+            Error::NoSuchLog(date) => eprintln!("No log for {date}"),
             Error::NotATask(ns) => {
                 if ns.is_empty() {
                     eprintln!("Not a task.");
diff --git a/src/cli/layout/line.rs b/src/cli/layout/line.rs
index 171dd3e..fffaab6 100644
--- a/src/cli/layout/line.rs
+++ b/src/cli/layout/line.rs
@@ -185,7 +185,7 @@ impl LineLayout {
                 let extra = if *d == 1 {
                     "yesterday".to_string()
                 } else {
-                    format!("{} days ago", d)
+                    format!("{d} days ago")
                 };
                 self.line_entry(entries, *i, Times::Untimed, Some(extra));
             }
@@ -194,7 +194,7 @@ impl LineLayout {
             }
             DayEntry::ReminderWhile(i, d) => {
                 let plural = if *d == 1 { "" } else { "s" };
-                let extra = format!("{} day{} left", d, plural);
+                let extra = format!("{d} day{plural} left");
                 self.line_entry(entries, *i, Times::Untimed, Some(extra));
             }
             DayEntry::Undated(i) => {
@@ -208,7 +208,7 @@ impl LineLayout {
                 let extra = if *d == 1 {
                     "tomorrow".to_string()
                 } else {
-                    format!("in {} days", d)
+                    format!("in {d} days")
                 };
                 self.line_entry(entries, *i, Times::Untimed, Some(extra));
             }
diff --git a/src/cli/print.rs b/src/cli/print.rs
index 1cdfe4d..1cb8caf 100644
--- a/src/cli/print.rs
+++ b/src/cli/print.rs
@@ -63,28 +63,25 @@ impl ShowLines {
         };
 
         // '=' symbols before the spans start
-        let p1 = format!("{:=<w$}=", "", w = self.num_width);
+        let p1 = styled(&format!("{:=<w$}=", "", w = self.num_width));
 
         // Spans and filler '=' symbols
         let p2 = self.display_spans(spans, styled("="));
 
         // The rest of the line until after the date
-        let p3 = format!("===  {:9}  {}", weekday, date,);
+        let p3 = styled(&format!("===  {weekday:9}  {date}"));
 
         // The "has log" marker (if any)
         let p4 = Self::display_marker(has_log, " ");
 
         // The rest of the line
-        let p5 = format!(" ===={:=<w$}", "", w = self.num_width + self.span_width);
-
-        self.push(&format!(
-            "{}{}{}{}{}\n",
-            styled(&p1),
-            p2,
-            styled(&p3),
-            p4,
-            styled(&p5)
+        let p5 = styled(&format!(
+            " ===={:=<w$}",
+            "",
+            w = self.num_width + self.span_width
         ));
+
+        self.push(&format!("{p1}{p2}{p3}{p4}{p5}\n"));
     }
 
     fn display_line_now(&mut self, spans: &[Option<SpanSegment>], time: Time) {
@@ -109,7 +106,7 @@ impl ShowLines {
         extra: &Option<String>,
     ) {
         let num = match number {
-            Some(n) => format!("{}", n),
+            Some(n) => format!("{n}"),
             None => "".to_string(),
         };
 
@@ -137,9 +134,9 @@ impl ShowLines {
                     SpanSegment::Middle(SpanStyle::Dotted) => "┊".bright_black(),
                     SpanSegment::End(_) => "└".bright_black(),
                 };
-                result.push_str(&format!("{}", colored_str));
+                result.push_str(&format!("{colored_str}"));
             } else {
-                result.push_str(&format!("{}", empty));
+                result.push_str(&format!("{empty}"));
             }
         }
         result
@@ -148,8 +145,8 @@ impl ShowLines {
     fn display_time(time: Times) -> ColoredString {
         match time {
             Times::Untimed => "".into(),
-            Times::At(t) => format!(" {}", t).bright_black(),
-            Times::FromTo(t1, t2) => format!(" {}--{}", t1, t2).bright_black(),
+            Times::At(t) => format!(" {t}").bright_black(),
+            Times::FromTo(t1, t2) => format!(" {t1}--{t2}").bright_black(),
         }
     }
 
@@ -164,7 +161,7 @@ impl ShowLines {
     fn display_extra(extra: &Option<String>) -> ColoredString {
         match extra {
             None => "".into(),
-            Some(extra) => format!(" ({})", extra).bright_black(),
+            Some(extra) => format!(" ({extra})").bright_black(),
         }
     }
 
diff --git a/src/cli/show.rs b/src/cli/show.rs
index 6b40e9b..12bcc31 100644
--- a/src/cli/show.rs
+++ b/src/cli/show.rs
@@ -16,7 +16,8 @@ fn fmt_where(files: &Files, command: &Sourced<'_, Spanned<Command>>) -> String {
     let line = files
         .line_index(command.source.file(), command.value.span.start)
         .expect("file exists and line is valid");
-    format!("Line {} in {}", line + 1, name)
+    let line = line + 1; // 1-indexed for human consumption
+    format!("Line {line} in {name}")
 }
 
 fn print_desc(command: &Sourced<'_, Spanned<Command>>) {
@@ -42,11 +43,11 @@ fn show_entry(files: &Files, entry: &Entry) {
 
     let what = match entry.kind {
         EntryKind::Task => "Task".to_string(),
-        EntryKind::TaskDone(date) => format!("Task, done {}", date),
-        EntryKind::TaskCanceled(date) => format!("Task, canceled {}", date),
+        EntryKind::TaskDone(date) => format!("Task, done {date}"),
+        EntryKind::TaskCanceled(date) => format!("Task, canceled {date}"),
         EntryKind::Note => "Note".to_string(),
         EntryKind::Birthday(None) => "Birthday, age unknown".to_string(),
-        EntryKind::Birthday(Some(age)) => format!("Birthday, age {}", age),
+        EntryKind::Birthday(Some(age)) => format!("Birthday, age {age}"),
     };
     println!("{}  {}", "What:".bright_black(), what);
 
@@ -76,7 +77,7 @@ fn show_ident(files: &Files, entries: &[Entry], layout: &LineLayout, ident: Iden
     match ident {
         Ident::Number(n) => match layout.look_up_number(n) {
             Ok(index) => show_entry(files, &entries[index]),
-            Err(e) => println!("{}", e),
+            Err(e) => println!("{e}"),
         },
         Ident::Date(date) => match files.log(date) {
             Some(log) => show_log(files, log),
diff --git a/src/error.rs b/src/error.rs
index 89e85e7..b8a658e 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -11,7 +11,7 @@ pub trait Eprint<'a, F: Files<'a>> {
     ) {
         let mut out = StandardStream::stderr(termcolor::ColorChoice::Auto);
         if let Err(e) = term::emit(&mut out, config, files, diagnostic) {
-            panic!("Error while reporting error: {}", e);
+            panic!("Error while reporting error: {e}");
         }
     }
 
diff --git a/src/eval/command/formula.rs b/src/eval/command/formula.rs
index e733937..c9a8692 100644
--- a/src/eval/command/formula.rs
+++ b/src/eval/command/formula.rs
@@ -391,7 +391,7 @@ mod tests {
         if let Ok(result) = expr.eval((), date) {
             assert_eq!(result, target);
         } else {
-            panic!("formula produced error for day {}", date);
+            panic!("formula produced error for day {date}");
         }
     }
 
diff --git a/src/eval/error.rs b/src/eval/error.rs
index 4e5bd45..c78a131 100644
--- a/src/eval/error.rs
+++ b/src/eval/error.rs
@@ -106,8 +106,8 @@ impl<'a, F: Files<'a>> Eprint<'a, F> for Error<F::FileId> {
                         Label::primary(*index, span).with_message("At this step")
                     ])
                     .with_notes(vec![
-                        format!("Date before applying delta: {}", start_str),
-                        format!("Date before applying this step: {}", prev_str),
+                        format!("Date before applying delta: {start_str}"),
+                        format!("Date before applying this step: {prev_str}"),
                     ])
             }
             Error::DeltaNoTime {
@@ -121,8 +121,8 @@ impl<'a, F: Files<'a>> Eprint<'a, F> for Error<F::FileId> {
                     Label::primary(*index, span).with_message("At this step")
                 ])
                 .with_notes(vec![
-                    format!("Date before applying delta: {}", start),
-                    format!("Date before applying this step: {}", prev),
+                    format!("Date before applying delta: {start}"),
+                    format!("Date before applying this step: {prev}"),
                 ]),
             Error::RepeatDidNotMoveForwards {
                 index,
@@ -132,7 +132,7 @@ impl<'a, F: Files<'a>> Eprint<'a, F> for Error<F::FileId> {
             } => Diagnostic::error()
                 .with_message("Repeat delta did not move forwards")
                 .with_labels(vec![Label::primary(*index, span).with_message("This delta")])
-                .with_notes(vec![format!("Moved from {} to {}", from, to)]),
+                .with_notes(vec![format!("Moved from {from} to {to}")]),
             Error::RemindDidNotMoveBackwards {
                 index,
                 span,
@@ -141,7 +141,7 @@ impl<'a, F: Files<'a>> Eprint<'a, F> for Error<F::FileId> {
             } => Diagnostic::error()
                 .with_message("Remind delta did not move backwards")
                 .with_labels(vec![Label::primary(*index, span).with_message("This delta")])
-                .with_notes(vec![format!("Moved from {} to {}", from, to)]),
+                .with_notes(vec![format!("Moved from {from} to {to}")]),
             Error::MoveWithoutSource { index, span } => Diagnostic::error()
                 .with_message("Tried to move nonexistent entry")
                 .with_labels(vec![Label::primary(*index, span).with_message("Here")]),
@@ -153,13 +153,13 @@ impl<'a, F: Files<'a>> Eprint<'a, F> for Error<F::FileId> {
                 .with_labels(vec![
                     Label::primary(*index, span).with_message("This expression")
                 ])
-                .with_notes(vec![format!("At date: {}", date)]),
+                .with_notes(vec![format!("At date: {date}")]),
             Error::ModByZero { index, span, date } => Diagnostic::error()
                 .with_message("Tried to modulo by zero")
                 .with_labels(vec![
                     Label::primary(*index, span).with_message("This expression")
                 ])
-                .with_notes(vec![format!("At date: {}", date)]),
+                .with_notes(vec![format!("At date: {date}")]),
             Error::Easter {
                 index,
                 span,
@@ -170,10 +170,7 @@ impl<'a, F: Files<'a>> Eprint<'a, F> for Error<F::FileId> {
                 .with_labels(vec![
                     Label::primary(*index, span).with_message("This expression")
                 ])
-                .with_notes(vec![
-                    format!("At date: {}", date),
-                    format!("Reason: {}", msg),
-                ]),
+                .with_notes(vec![format!("At date: {date}"), format!("Reason: {msg}")]),
         };
         Self::eprint_diagnostic(files, config, &diagnostic);
     }
diff --git a/src/files/error.rs b/src/files/error.rs
index 983160d..aabd582 100644
--- a/src/files/error.rs
+++ b/src/files/error.rs
@@ -40,7 +40,7 @@ impl<S> ParseError<S> {
                     .collect::<Vec<_>>()
                     .join(", ");
                 let last = Self::rule_name(rules[n - 1]);
-                format!("{} or {}", except_last, last)
+                format!("{except_last} or {last}")
             }
         }
     }
@@ -76,7 +76,7 @@ where
         };
         let name = files.name(self.file).expect("file exists");
         let diagnostic = Diagnostic::error()
-            .with_message(format!("Could not parse {}", name))
+            .with_message(format!("Could not parse {name}"))
             .with_labels(vec![Label::primary(self.file, range)])
             .with_notes(self.notes());
         Self::eprint_diagnostic(files, config, &diagnostic);
@@ -135,16 +135,16 @@ impl<'a> Eprint<'a, Files> for Error {
     fn eprint<'f: 'a>(&self, files: &'f Files, config: &Config) {
         match self {
             Error::ResolvePath { path, error } => {
-                eprintln!("Could not resolve path {:?}:", path);
-                eprintln!("  {}", error);
+                eprintln!("Could not resolve path {path:?}:");
+                eprintln!("  {error}");
             }
             Error::ReadFile { file, error } => {
-                eprintln!("Could not read file {:?}:", file);
-                eprintln!("  {}", error);
+                eprintln!("Could not read file {file:?}:");
+                eprintln!("  {error}");
             }
             Error::WriteFile { file, error } => {
-                eprintln!("Could not write file {:?}:", file);
-                eprintln!("  {}", error);
+                eprintln!("Could not write file {file:?}:");
+                eprintln!("  {error}");
             }
             Error::ResolveTz {
                 file,
@@ -153,16 +153,16 @@ impl<'a> Eprint<'a, Files> for Error {
                 error,
             } => {
                 let diagnostic = Diagnostic::error()
-                    .with_message(format!("Could not resolve time zone {}", tz))
+                    .with_message(format!("Could not resolve time zone {tz}"))
                     .with_labels(vec![
                         Label::primary(*file, span).with_message("Time zone defined here")
                     ])
-                    .with_notes(vec![format!("{}", error)]);
+                    .with_notes(vec![format!("{error}")]);
                 Self::eprint_diagnostic(files, config, &diagnostic);
             }
             Error::LocalTz { error } => {
                 eprintln!("Could not determine local timezone:");
-                eprintln!("  {}", error);
+                eprintln!("  {error}");
             }
             Error::Parse { file, error } => {
                 ParseError::new(*file, error.clone()).eprint(files, config)
@@ -176,7 +176,7 @@ impl<'a> Eprint<'a, Files> for Error {
                 tz2,
             } => {
                 let diagnostic = Diagnostic::error()
-                    .with_message(format!("Time zone conflict between {} and {}", tz1, tz2))
+                    .with_message(format!("Time zone conflict between {tz1} and {tz2}"))
                     .with_labels(vec![
                         Label::primary(*file1, span1).with_message("Time zone defined here"),
                         Label::primary(*file2, span2).with_message("Time zone defined here"),
@@ -211,7 +211,7 @@ impl<'a> Eprint<'a, Files> for Error {
                 date,
             } => {
                 let diagnostic = Diagnostic::error()
-                    .with_message(format!("Duplicate log entries for {}", date))
+                    .with_message(format!("Duplicate log entries for {date}"))
                     .with_labels(vec![
                         Label::primary(*file1, span1).with_message("Log defined here"),
                         Label::primary(*file2, span2).with_message("Log defined here"),
diff --git a/src/files/format.rs b/src/files/format.rs
index f9ad86a..5f2ec3f 100644
--- a/src/files/format.rs
+++ b/src/files/format.rs
@@ -22,7 +22,7 @@ fn format_desc(f: &mut fmt::Formatter<'_>, desc: &[String]) -> fmt::Result {
         if line.is_empty() {
             writeln!(f, "#")?;
         } else {
-            writeln!(f, "# {}", line)?;
+            writeln!(f, "# {line}")?;
         }
     }
     Ok(())
@@ -76,29 +76,29 @@ impl fmt::Display for DateSpec {
         // Start
         write!(f, "{}", self.start)?;
         for delta in &self.start_delta {
-            write!(f, " {}", delta)?;
+            write!(f, " {delta}")?;
         }
         for time in &self.start_time {
-            write!(f, " {}", time)?;
+            write!(f, " {time}")?;
         }
 
         // End
         if self.end.is_some() || self.end_delta.is_some() || self.end_time.is_some() {
             write!(f, " --")?;
             if let Some(date) = self.end {
-                write!(f, " {}", date)?;
+                write!(f, " {date}")?;
             }
             if let Some(delta) = &self.end_delta {
-                write!(f, " {}", delta)?;
+                write!(f, " {delta}")?;
             }
             if let Some(time) = &self.end_time {
-                write!(f, " {}", time)?;
+                write!(f, " {time}")?;
             }
         }
 
         // Repeat
         if let Some(repeat) = &self.repeat {
-            write!(f, "; {}", repeat)?;
+            write!(f, "; {repeat}")?;
         }
 
         Ok(())
@@ -110,20 +110,20 @@ impl fmt::Display for WeekdaySpec {
         // Start
         write!(f, "{}", self.start)?;
         for time in &self.start_time {
-            write!(f, " {}", time)?;
+            write!(f, " {time}")?;
         }
 
         // End
         if self.end.is_some() || self.end_delta.is_some() || self.end_time.is_some() {
             write!(f, " --")?;
             if let Some(wd) = self.end {
-                write!(f, " {}", wd)?;
+                write!(f, " {wd}")?;
             }
             if let Some(delta) = &self.end_delta {
-                write!(f, " {}", delta)?;
+                write!(f, " {delta}")?;
             }
             if let Some(time) = &self.end_time {
-                write!(f, " {}", time)?;
+                write!(f, " {time}")?;
             }
         }
 
@@ -140,25 +140,25 @@ impl fmt::Display for Var {
 impl fmt::Display for Expr {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
-            Expr::Lit(i) => write!(f, "{}", i),
-            Expr::Var(v) => write!(f, "{}", v),
-            Expr::Paren(e) => write!(f, "({})", e),
-            Expr::Neg(e) => write!(f, "-{}", e),
-            Expr::Add(a, b) => write!(f, "{} + {}", a, b),
-            Expr::Sub(a, b) => write!(f, "{} - {}", a, b),
-            Expr::Mul(a, b) => write!(f, "{} * {}", a, b),
-            Expr::Div(a, b) => write!(f, "{} / {}", a, b),
-            Expr::Mod(a, b) => write!(f, "{} % {}", a, b),
-            Expr::Eq(a, b) => write!(f, "{} = {}", a, b),
-            Expr::Neq(a, b) => write!(f, "{} != {}", a, b),
-            Expr::Lt(a, b) => write!(f, "{} < {}", a, b),
-            Expr::Lte(a, b) => write!(f, "{} <= {}", a, b),
-            Expr::Gt(a, b) => write!(f, "{} > {}", a, b),
-            Expr::Gte(a, b) => write!(f, "{} >= {}", a, b),
-            Expr::Not(e) => write!(f, "!{}", e),
-            Expr::And(a, b) => write!(f, "{} & {}", a, b),
-            Expr::Or(a, b) => write!(f, "{} | {}", a, b),
-            Expr::Xor(a, b) => write!(f, "{} ^ {}", a, b),
+            Expr::Lit(i) => write!(f, "{i}"),
+            Expr::Var(v) => write!(f, "{v}"),
+            Expr::Paren(e) => write!(f, "({e})"),
+            Expr::Neg(e) => write!(f, "-{e}"),
+            Expr::Add(a, b) => write!(f, "{a} + {b}"),
+            Expr::Sub(a, b) => write!(f, "{a} - {b}"),
+            Expr::Mul(a, b) => write!(f, "{a} * {b}"),
+            Expr::Div(a, b) => write!(f, "{a} / {b}"),
+            Expr::Mod(a, b) => write!(f, "{a} % {b}"),
+            Expr::Eq(a, b) => write!(f, "{a} = {b}"),
+            Expr::Neq(a, b) => write!(f, "{a} != {b}"),
+            Expr::Lt(a, b) => write!(f, "{a} < {b}"),
+            Expr::Lte(a, b) => write!(f, "{a} <= {b}"),
+            Expr::Gt(a, b) => write!(f, "{a} > {b}"),
+            Expr::Gte(a, b) => write!(f, "{a} >= {b}"),
+            Expr::Not(e) => write!(f, "!{e}"),
+            Expr::And(a, b) => write!(f, "{a} & {b}"),
+            Expr::Or(a, b) => write!(f, "{a} | {b}"),
+            Expr::Xor(a, b) => write!(f, "{a} ^ {b}"),
         }
     }
 }
@@ -167,25 +167,25 @@ impl fmt::Display for FormulaSpec {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         // Start
         if let Some(expr) = &self.start {
-            write!(f, "({})", expr)?;
+            write!(f, "({expr})")?;
         } else {
             write!(f, "*")?;
         }
         for delta in &self.start_delta {
-            write!(f, " {}", delta)?;
+            write!(f, " {delta}")?;
         }
         for time in &self.start_time {
-            write!(f, " {}", time)?;
+            write!(f, " {time}")?;
         }
 
         // End
         if self.end_delta.is_some() || self.end_time.is_some() {
             write!(f, " --")?;
             if let Some(delta) = &self.end_delta {
-                write!(f, " {}", delta)?;
+                write!(f, " {delta}")?;
             }
             if let Some(time) = &self.end_time {
-                write!(f, " {}", time)?;
+                write!(f, " {time}")?;
             }
         }
 
@@ -196,9 +196,9 @@ impl fmt::Display for FormulaSpec {
 impl fmt::Display for Spec {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
-            Spec::Date(spec) => write!(f, "{}", spec),
-            Spec::Weekday(spec) => write!(f, "{}", spec),
-            Spec::Formula(spec) => write!(f, "{}", spec),
+            Spec::Date(spec) => write!(f, "{spec}"),
+            Spec::Weekday(spec) => write!(f, "{spec}"),
+            Spec::Formula(spec) => write!(f, "{spec}"),
         }
     }
 }
@@ -216,22 +216,22 @@ impl fmt::Display for BirthdaySpec {
 impl fmt::Display for Statement {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
-            Statement::Date(spec) => writeln!(f, "DATE {}", spec),
-            Statement::BDate(spec) => writeln!(f, "BDATE {}", spec),
-            Statement::From(Some(date)) => writeln!(f, "FROM {}", date),
+            Statement::Date(spec) => writeln!(f, "DATE {spec}"),
+            Statement::BDate(spec) => writeln!(f, "BDATE {spec}"),
+            Statement::From(Some(date)) => writeln!(f, "FROM {date}"),
             Statement::From(None) => writeln!(f, "FROM *"),
-            Statement::Until(Some(date)) => writeln!(f, "UNTIL {}", date),
+            Statement::Until(Some(date)) => writeln!(f, "UNTIL {date}"),
             Statement::Until(None) => writeln!(f, "UNTIL *"),
-            Statement::Except(date) => writeln!(f, "EXCEPT {}", date),
+            Statement::Except(date) => writeln!(f, "EXCEPT {date}"),
             Statement::Move {
                 from, to, to_time, ..
             } => match (to, to_time) {
                 (None, None) => unreachable!(),
-                (Some(to), None) => writeln!(f, "MOVE {} TO {}", from, to),
-                (None, Some(to_time)) => writeln!(f, "MOVE {} TO {}", from, to_time),
-                (Some(to), Some(to_time)) => writeln!(f, "MOVE {} TO {} {}", from, to, to_time),
+                (Some(to), None) => writeln!(f, "MOVE {from} TO {to}"),
+                (None, Some(to_time)) => writeln!(f, "MOVE {from} TO {to_time}"),
+                (Some(to), Some(to_time)) => writeln!(f, "MOVE {from} TO {to} {to_time}"),
             },
-            Statement::Remind(Some(delta)) => writeln!(f, "REMIND {}", delta),
+            Statement::Remind(Some(delta)) => writeln!(f, "REMIND {delta}"),
             Statement::Remind(None) => writeln!(f, "REMIND *"),
         }
     }
@@ -240,20 +240,20 @@ impl fmt::Display for Statement {
 impl fmt::Display for DoneDate {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self.simplified() {
-            DoneDate::Date { root } => write!(f, "{}", root),
-            DoneDate::DateTime { root, root_time } => write!(f, "{} {}", root, root_time),
-            DoneDate::DateToDate { root, other } => write!(f, "{} -- {}", root, other),
+            DoneDate::Date { root } => write!(f, "{root}"),
+            DoneDate::DateTime { root, root_time } => write!(f, "{root} {root_time}"),
+            DoneDate::DateToDate { root, other } => write!(f, "{root} -- {other}"),
             DoneDate::DateTimeToTime {
                 root,
                 root_time,
                 other_time,
-            } => write!(f, "{} {} -- {}", root, root_time, other_time),
+            } => write!(f, "{root} {root_time} -- {other_time}"),
             DoneDate::DateTimeToDateTime {
                 root,
                 root_time,
                 other,
                 other_time,
-            } => write!(f, "{} {} -- {} {}", root, root_time, other, other_time),
+            } => write!(f, "{root} {root_time} -- {other} {other_time}"),
         }
     }
 }
@@ -264,9 +264,9 @@ impl fmt::Display for Done {
             DoneKind::Done => "DONE",
             DoneKind::Canceled => "CANCELED",
         };
-        write!(f, "{} [{}]", kind, self.done_at)?;
+        write!(f, "{kind} [{}]", self.done_at)?;
         if let Some(date) = &self.date {
-            write!(f, " {}", date)?;
+            write!(f, " {date}")?;
         }
         writeln!(f)
     }
@@ -276,10 +276,10 @@ impl fmt::Display for Task {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(f, "TASK {}", self.title)?;
         for statement in &self.statements {
-            write!(f, "{}", statement)?;
+            write!(f, "{statement}")?;
         }
         for done in &self.done {
-            write!(f, "{}", done)?;
+            write!(f, "{done}")?;
         }
         format_desc(f, &self.desc)?;
         Ok(())
@@ -290,26 +290,13 @@ impl fmt::Display for Note {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(f, "NOTE {}", self.title)?;
         for statement in &self.statements {
-            write!(f, "{}", statement)?;
+            write!(f, "{statement}")?;
         }
         format_desc(f, &self.desc)?;
         Ok(())
     }
 }
 
-impl fmt::Display for Command {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            Command::Include(name) => writeln!(f, "INCLUDE {}", name),
-            Command::Timezone(name) => writeln!(f, "TIMEZONE {}", name),
-            Command::Capture => writeln!(f, "CAPTURE"),
-            Command::Task(task) => write!(f, "{}", task),
-            Command::Note(note) => write!(f, "{}", note),
-            Command::Log(log) => write!(f, "{}", log),
-        }
-    }
-}
-
 impl fmt::Display for Log {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(f, "LOG {}", self.date)?;
@@ -318,6 +305,19 @@ impl fmt::Display for Log {
     }
 }
 
+impl fmt::Display for Command {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Command::Include(name) => writeln!(f, "INCLUDE {name}"),
+            Command::Timezone(name) => writeln!(f, "TIMEZONE {name}"),
+            Command::Capture => writeln!(f, "CAPTURE"),
+            Command::Task(task) => write!(f, "{task}"),
+            Command::Note(note) => write!(f, "{note}"),
+            Command::Log(log) => write!(f, "{log}"),
+        }
+    }
+}
+
 impl File {
     fn sort(commands: &mut Vec<&Command>) {
         // Order of commands in a file:
@@ -372,7 +372,7 @@ impl File {
             let curr = &commands[i];
             let next = commands.get(i + 1);
 
-            result.push_str(&format!("{}", curr));
+            result.push_str(&format!("{curr}"));
 
             match (curr, next) {
                 (Command::Include(_), Some(Command::Include(_))) => {}
diff --git a/src/main.rs b/src/main.rs
index c55f748..5d5922f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,8 +3,6 @@
 #![warn(clippy::all)]
 #![warn(clippy::use_self)]
 
-// TODO Switch to new format syntax project-wide
-
 mod cli;
 mod error;
 mod eval;