diff --git a/server/build.rs b/server/build.rs
index 577df89..0054cee 100644
--- a/server/build.rs
+++ b/server/build.rs
@@ -60,14 +60,14 @@ type FileMap = std::collections::HashMap<String, File, ahash::RandomState>;
 
 fn stringify_files(files: &FileMap) -> Result<String, std::fmt::Error> {
     let mut buf = String::new();
-    write!(buf, "const FILES: [BuildFile; {}] = [\n", files.len())?;
+    writeln!(buf, "const FILES: [BuildFile; {}] = [", files.len())?;
     for (bare_path, file) in files {
         let include_path = &file.include_path;
         let etag = file.etag.to_hex();
         let encoding = file.encoding.to_str();
-        write!(buf, "    BuildFile {{ bare_path: {bare_path:?}, data: include_bytes!({include_path:?}), etag: {etag:?}, encoding: {encoding} }},\n")?;
+        writeln!(buf, "    BuildFile {{ bare_path: {bare_path:?}, data: include_bytes!({include_path:?}), etag: {etag:?}, encoding: {encoding} }},")?;
     }
-    write!(buf, "];\n")?;
+    writeln!(buf, "];")?;
     Ok(buf)
 }
 
diff --git a/server/db/check.rs b/server/db/check.rs
index 110b48c..419a5dc 100644
--- a/server/db/check.rs
+++ b/server/db/check.rs
@@ -345,7 +345,7 @@ fn compare_stream(
             stream
                 .recordings
                 .entry(id.recording())
-                .or_insert_with(Recording::default)
+                .or_default()
                 .recording_row = Some(s);
         }
     }
@@ -382,7 +382,7 @@ fn compare_stream(
             stream
                 .recordings
                 .entry(id.recording())
-                .or_insert_with(Recording::default)
+                .or_default()
                 .playback_row = Some(s);
         }
     }
@@ -405,7 +405,7 @@ fn compare_stream(
             stream
                 .recordings
                 .entry(id.recording())
-                .or_insert_with(Recording::default)
+                .or_default()
                 .integrity_row = true;
         }
     }
diff --git a/server/db/days.rs b/server/db/days.rs
index ed212ef..d78244b 100644
--- a/server/db/days.rs
+++ b/server/db/days.rs
@@ -102,7 +102,7 @@ impl Value for SignalValue {
     type Change = SignalChange;
 
     fn apply(&mut self, c: &SignalChange) {
-        if self.states.len() < usize::try_from(c.new_state).unwrap() {
+        if self.states.len() < usize::from(c.new_state) {
             self.states.resize(c.new_state as usize, 0);
         }
 
@@ -117,7 +117,7 @@ impl Value for SignalValue {
 
         if c.old_state > 0 {
             // remove from old state.
-            let i = usize::try_from(c.old_state).unwrap() - 1;
+            let i = usize::from(c.old_state) - 1;
             assert!(
                 self.states.len() > i,
                 "no such old state: s={self:?} c={c:?}"
diff --git a/server/src/cmds/run/mod.rs b/server/src/cmds/run/mod.rs
index 916a165..7c89b9a 100644
--- a/server/src/cmds/run/mod.rs
+++ b/server/src/cmds/run/mod.rs
@@ -183,7 +183,7 @@ fn get_preopened_sockets() -> Result<FastHashMap<String, Listener>, Error> {
 fn read_config(path: &Path) -> Result<ConfigFile, Error> {
     let config = std::fs::read(path)?;
     let config = std::str::from_utf8(&config).map_err(|e| err!(InvalidArgument, source(e)))?;
-    let config = toml::from_str(&config).map_err(|e| err!(InvalidArgument, source(e)))?;
+    let config = toml::from_str(config).map_err(|e| err!(InvalidArgument, source(e)))?;
     Ok(config)
 }
 
diff --git a/server/src/slices.rs b/server/src/slices.rs
index a30b165..7653aa4 100644
--- a/server/src/slices.rs
+++ b/server/src/slices.rs
@@ -145,7 +145,7 @@ where
         // (from the preceding slice) the start of its range.
         let (i, slice_start) = match self.slices.binary_search_by_key(&range.start, |s| s.end()) {
             Ok(i) => (i + 1, self.slices[i].end()), // desired start == slice i's end; first is i+1!
-            Err(i) if i == 0 => (0, 0),             // desired start < slice 0's end; first is 0.
+            Err(0) => (0, 0),                       // desired start < slice 0's end; first is 0.
             Err(i) => (i, self.slices[i - 1].end()), // desired start < slice i's end; first is i.
         };
 
diff --git a/server/src/web/static_file.rs b/server/src/web/static_file.rs
index 8e1d75c..00b9f68 100644
--- a/server/src/web/static_file.rs
+++ b/server/src/web/static_file.rs
@@ -74,7 +74,7 @@ impl Ui {
                 );
                 hdrs.insert(header::CONTENT_TYPE, HeaderValue::from_static(content_type));
                 let e = node.into_file_entity(hdrs).err_kind(ErrorKind::Internal)?;
-                Ok(http_serve::serve(e, &req))
+                Ok(http_serve::serve(e, req))
             }
             #[cfg(feature = "bundled-ui")]
             Ui::Bundled(ui) => {