Apply Clippy 0.1.85's new suggestions

src/array_decoder/list.rs

@@ -78,7 +78,7 @@ impl ArrayBatchDecoder for ListArrayDecoder {
         // Fetch child array as one Array with total_length elements
         let child_array = self.inner.next_batch(total_length as usize, None)?;
         let offsets = OffsetBuffer::from_lengths(lengths.into_iter().map(|l| l as usize));
-        let null_buffer = present.map(NullBuffer::from);
+        let null_buffer = present;
 
         let array = ListArray::try_new(self.field.clone(), offsets, child_array, null_buffer)
             .context(ArrowSnafu)?;

src/array_decoder/struct_decoder.rs

@@ -70,7 +70,7 @@ impl ArrayBatchDecoder for StructArrayDecoder {
             .map(|child| child.next_batch(batch_size, present.as_ref()))
             .collect::<Result<Vec<_>>>()?;
 
-        let null_buffer = present.map(NullBuffer::from);
+        let null_buffer = present;
         let array = StructArray::try_new(self.fields.clone(), child_arrays, null_buffer)
             .context(ArrowSnafu)?;
         let array = Arc::new(array);

src/encoding/integer/rle_v2/delta.rs

@@ -175,7 +175,7 @@ fn derive_delta_header(delta_width: usize, run_length: usize) -> [u8; 2] {
     let encoded_length_high_bit = (run_length >> 8) as u8;
     let encoded_length_low_bits = (run_length & 0xFF) as u8;
 
-    let header1 = EncodingType::Delta.to_header() | delta_width << 1 | encoded_length_high_bit;
+    let header1 = EncodingType::Delta.to_header() | (delta_width << 1) | encoded_length_high_bit;
     let header2 = encoded_length_low_bits;
 
     [header1, header2]

src/encoding/integer/rle_v2/patched_base.rs

@@ -256,10 +256,10 @@ pub fn write_patched_base(
     let encoded_patch_gap_width = patch_gap_width - 1;
 
     let header1 =
-        EncodingType::PatchedBase.to_header() | encoded_bit_width << 1 | encoded_length_high_bit;
+        EncodingType::PatchedBase.to_header() | (encoded_bit_width << 1) | encoded_length_high_bit;
     let header2 = encoded_length_low_bits;
-    let header3 = (encoded_base_width as u8) << 5 | encoded_patch_bits_width as u8;
-    let header4 = (encoded_patch_gap_width as u8) << 5 | patches.len() as u8;
+    let header3 = ((encoded_base_width as u8) << 5) | encoded_patch_bits_width as u8;
+    let header4 = ((encoded_patch_gap_width as u8) << 5) | patches.len() as u8;
     writer.put_slice(&[header1, header2, header3, header4]);
 
     // Write out base value as big endian bytes