chore: clippy fixes, largely removing unecessary return statements

src/oned/telepen_common.rs

@@ -10,11 +10,11 @@ pub fn calculate_checksum(contents: &str) -> char {
 
     let remainder = sum % 127;
     let diff = 127 - remainder;
-    return if diff != 127 {
+    if diff != 127 {
         diff as u8 as char
     } else {
         0 as char
-    };
+    }
 }
 
 pub fn ascii_to_numeric(contents: &str) -> String {
@@ -28,7 +28,7 @@ pub fn ascii_to_numeric(contents: &str) -> String {
         }
     }
 
-    return number;
+    number
 }
 
 pub fn numeric_to_ascii(contents: &str) -> Result<String> {
@@ -45,21 +45,21 @@ pub fn numeric_to_ascii(contents: &str) -> Result<String> {
         let first = contents.chars().nth(i).unwrap() as u8;
         let second = contents.chars().nth(i + 1).unwrap() as u8;
 
-        if second == 88 && first >= 48 && first <= 57 {
+        if second == 88 && (48..=57).contains(&first) {
             ascii.push((17 + first - 48) as char);
-        } else if second >= 48 && second <= 57 && first >= 48 && first <= 57 {
+        } else if (48..=57).contains(&second) && (48..=57).contains(&first) {
             ascii.push((27 + (first - 48) * 10 + (second - 48)) as char);
         } else {
             return Err(Exceptions::illegal_argument_with(format!(
                 "Input contains an invalid character around position {}.",
-                i.to_string()
+                i
             )));
         }
 
         i += 2;
     }
 
-    return Ok(ascii);
+    Ok(ascii)
 }
 
 #[test]

src/oned/telepen_reader.rs

@@ -122,15 +122,13 @@ impl OneDReader for TelepenReader {
                     // Narrow white: .
                     pattern[patternLength] = 0;
                 }
-            } else {
-                if isBlack {
+            } else if isBlack {
                 // Wide black: BBB
                 pattern[patternLength] = 3;
             } else {
                 // Wide white: ...
                 pattern[patternLength] = 2;
             }
-            }
 
             patternLength += 1;
             j += 1;
@@ -356,7 +354,7 @@ impl TelepenReader {
 
             j = 0;
 
-            let median = minBar as f32 + maxBar as f32 / 2.0;
+            let median = minBar + maxBar / 2.0;
             let mut passed = true;
 
             // First 10 items must be:
@@ -410,13 +408,13 @@ impl TelepenReader {
             i = start + 20;
 
             while i < self.counterLength {
-                if (self.counters[i] as f32) > (maxBar as f32 * (1.0 + TOLERANCE)) {
+                if (self.counters[i] as f32) > (maxBar * (1.0 + TOLERANCE)) {
                     return Ok((i - 1) as u32);
                 }
 
                 i += 1;
             }
         }
-        return Ok((self.counterLength - 1) as u32);
+        Ok((self.counterLength - 1) as u32)
     }
 }

src/oned/telepen_writer.rs

@@ -46,7 +46,7 @@ impl OneDimensionalCodeWriter for TelepenWriter {
             hints.get(&EncodeHintType::TELEPEN_AS_NUMERIC),
             Some(EncodeHintValue::TelepenAsNumeric(true))
         ) {
-            decodedContents = telepen_common::numeric_to_ascii(&contents)?;
+            decodedContents = telepen_common::numeric_to_ascii(contents)?;
         }
 
         // Calculate the checksum character
@@ -61,9 +61,9 @@ impl OneDimensionalCodeWriter for TelepenWriter {
         // Content
         for c in decodedContents.chars() {
             if c as u32 > 127 {
-                return Err(Exceptions::illegal_argument_with(format!(
-                    "Telepen only supports ASCII characters."
-                )));
+                return Err(Exceptions::illegal_argument_with(
+                    "Telepen only supports ASCII characters.".to_string(),
+                ));
             }
 
             binary = self.add_to_binary(c, binary)
@@ -129,9 +129,9 @@ impl OneDimensionalCodeWriter for TelepenWriter {
                     resultPosition += 4;
                 }
                 "0" => {
-                    return Err(Exceptions::illegal_argument_with(format!(
-                        "Invalid bit combination!"
-                    )));
+                    return Err(Exceptions::illegal_argument_with(
+                        "Invalid bit combination!".to_string(),
+                    ));
                 }
                 _ => {
                     // B... (B.)* B...
@@ -185,7 +185,7 @@ impl TelepenWriter {
         // of 1s in the 8 bits.
         bits[7] = oneCount % 2 != 0;
 
-        return bits;
+        bits
     }
 
     fn add_to_binary(&self, c: char, mut binary: String) -> String {
@@ -196,7 +196,7 @@ impl TelepenWriter {
             binary.push(if bits[i] { '1' } else { '0' });
         }
 
-        return binary;
+        binary
     }
 }