diff --git a/expand/src/main.rs b/expand/src/main.rs
index 1b132ec9..622be958 100644
--- a/expand/src/main.rs
+++ b/expand/src/main.rs
@@ -94,7 +94,7 @@ impl Expand {
         Ok(Expand { initial, tabstops })
     }
 
-    fn expand_line(self: &mut Self, line: &str) -> String {
+    fn expand_line(&mut self, line: &str) -> String {
         let mut convert = true;
         let mut column = 0;
         let mut new_line: String = String::new();
diff --git a/unexpand/src/main.rs b/unexpand/src/main.rs
index 397840e0..a8eedb8f 100644
--- a/unexpand/src/main.rs
+++ b/unexpand/src/main.rs
@@ -103,7 +103,7 @@ impl Unexpand {
         Unexpand { all, tabs }
     }
 
-    fn unexpand_line(self: &mut Self, line: &str) -> String {
+    fn unexpand_line(&mut self, line: &str) -> String {
         let mut convert = true;
         let mut spaces: i32 = 0;
         let mut column: i32 = 0;
diff --git a/unexpand/src/tab_stops.rs b/unexpand/src/tab_stops.rs
index 443fbb51..d5e35946 100644
--- a/unexpand/src/tab_stops.rs
+++ b/unexpand/src/tab_stops.rs
@@ -92,7 +92,7 @@ impl TabStops {
         }
     }
 
-    pub fn is_tab_stop(self: &Self, column: usize) -> bool {
+    pub fn is_tab_stop(&self, column: usize) -> bool {
         if self.positions.contains(&column) {
             return true;
         }
diff --git a/uniq/src/main.rs b/uniq/src/main.rs
index 62ebf4b0..3245cce8 100644
--- a/uniq/src/main.rs
+++ b/uniq/src/main.rs
@@ -32,7 +32,7 @@ fn main() {
         }))
     };
 
-    if let Err(_) = uniq(&mut reader, &mut writer, flags) {
+    if uniq(&mut reader, &mut writer, flags).is_err() {
         process::exit(1);
     };
 }
@@ -44,6 +44,7 @@ struct Flags {
     supress_unique:   bool,        // -d | --repeated
     supress_repeated: bool,        // -u | --unique
     skip_chars:       Option<u64>, // -s | --skip-chars=N
+    #[allow(dead_code)]
     skip_fields:      Option<u64>, // -f | --skip-fields=N
 }
 
@@ -170,10 +171,8 @@ fn uniq<R: Read, W: Write>(
                 if line_changed && last_line_count == 1 {
                     line_to_show = Some(&last_line);
                 }
-            } else {
-                if line_changed {
-                    line_to_show = Some(&current_line);
-                }
+            } else if line_changed {
+                line_to_show = Some(&current_line);
             }
 
             if let Some(line) = line_to_show {