chore: cleanup some clippy errors

src/oned/code_128_writer_test_tase.rs

@@ -337,7 +337,7 @@ fn testEncodeWithForcedCodeSetFailureCodeSetABadCharacter() {
 #[test]
 #[should_panic]
 fn testEncodeWithForcedCodeSetFailureCodeSetBBadCharacter() {
-    let toEncode = "ASdf\00123"; // \0 (ascii value 0)
+    let toEncode = "ASdf\x000123"; // \0 (ascii value 0)
                                    // Characters with ASCII value below 32 should not be accepted when the code set is forced to B.
 
     let mut hints = HashMap::new(); //new EnumMap<>(EncodeHintType.class);

src/oned/telepen_writer.rs

@@ -244,12 +244,10 @@ mod TelepenWriterTestCase {
     }
 
     fn doTest(input: &str, expected: &str, numeric: bool) {
-        let result: BitMatrix;
-
-        if numeric {
-            result = encode_with_hints(input);
+        let result: BitMatrix = if numeric {
+            encode_with_hints(input)
         } else {
-            result = encode(input);
+            encode(input)
         };
 
         assert_eq!(expected, bit_matrix_test_case::matrix_to_string(&result));

src/qrcode/cpp_port/detector.rs

@@ -111,10 +111,10 @@ pub fn FindFinderPatterns(image: &BitMatrix, tryHarder: bool) -> FinderPatterns
                     next.iter().sum::<u16>() as i32 * 3,
                 ); // 3 for very skewed samples
                    //    Reduce(next) * 3); // 3 for very skewed samples
-                if pattern.is_some() {
+                if let Some(p) = pattern {
                     // log(*pattern, 3);
                     // assert!(image.get_point(pattern.as_ref().unwrap().p));
-                    res.push(pattern.unwrap());
+                    res.push(p);
                 }
             }
 
@@ -697,15 +697,7 @@ pub fn SampleQR(image: &BitMatrix, fp: &FinderPatternSet) -> Result<QRCodeDetect
                     let found = LocateAlignmentPattern(image, moduleSize, guessed);
                     // search again near that intersection and if the search fails, use the intersection
                     // if (!found.is_some()) {printf("location guessed at %dx%d\n", x, y)};
-                    apP.set(
-                        x,
-                        y,
-                        if found.is_some() {
-                            found.unwrap()
-                        } else {
-                            guessed
-                        },
-                    );
+                    apP.set(x, y, if let Some(f) = found { f } else { guessed });
                 }
             }
         }