Clarified a few pieces of Rust code.

rust/examples/qrcodegen-demo.rs

@@ -128,8 +128,8 @@ fn do_segment_demo() {
 		0x0000, 0x0208, 0x01FF, 0x0008,
 	];
 	let mut bb = qrcodegen::BitBuffer(Vec::new());
-	for c in &kanjichars {
+	for &c in &kanjichars {
-		bb.append_bits(*c, 13);
+		bb.append_bits(c, 13);
 	}
 	let segs = vec![
 		QrSegment::new(qrcodegen::QrSegmentMode::Kanji, kanjichars.len(), bb.0),

rust/src/lib.rs

@@ -296,7 +296,7 @@ impl QrCode {
 		
 		// Do masking
 		if mask.is_none() {  // Automatically choose best mask
-			let mut minpenalty: i32 = std::i32::MAX;
+			let mut minpenalty = std::i32::MAX;
 			for i in 0u8 .. 8 {
 				let newmask = Mask::new(i);
 				result.apply_mask(newmask);
@@ -617,10 +617,9 @@ impl QrCode {
 	// the same mask value a second time will undo the mask. A final well-formed
 	// QR Code needs exactly one (not zero, two, etc.) mask applied.
 	fn apply_mask(&mut self, mask: Mask) {
-		let mask: u8 = mask.value();
 		for y in 0 .. self.size {
 			for x in 0 .. self.size {
-				let invert: bool = match mask {
+				let invert: bool = match mask.value() {
 					0 => (x + y) % 2 == 0,
 					1 => y % 2 == 0,
 					2 => x % 3 == 0,