Fix some clippy warnings

src/cli/layout/line.rs

@@ -115,7 +115,7 @@ impl LineLayout {
             .filter(|(_, n)| **n == number)
             .map(|(i, _)| *i)
             .next()
-            .ok_or_else(|| Error::NoSuchEntry(number))
+            .ok_or(Error::NoSuchEntry(number))
     }
 
     fn render_layout_entry(&mut self, files: &Files, entries: &[Entry], l_entry: &DayEntry) {

src/eval/range.rs

@@ -58,7 +58,7 @@ impl DateRange {
 
     pub fn days(&self) -> impl Iterator<Item = NaiveDate> {
         (self.from.num_days_from_ce()..=self.until.num_days_from_ce())
-            .map(|n| NaiveDate::from_num_days_from_ce(n))
+            .map(NaiveDate::from_num_days_from_ce)
     }
 
     pub fn years(&self) -> RangeInclusive<i32> {