Various clippy fixes

Also use `nightly` for local clippy tests

BUILD.md

@@ -10,14 +10,14 @@ cargo build --all-features && \
 cargo test --all-features && \
 cargo +nightly doc --all-features && \
 cargo fmt --all -- --check && \
-cargo clippy --all-features -- -D warnings && \
+cargo +nightly clippy --all-features -- -D warnings && \
 cargo check && \
 cargo check --no-default-features
 ```
 
 ```bash
 # Additional checks
-cargo clippy --all-features -- -D warnings -W clippy::nursery -A clippy::significant_drop_tightening -A clippy::significant_drop_in_scrutinee
+cargo +nightly clippy --all-features -- -D warnings -W clippy::nursery -A clippy::significant_drop_tightening -A clippy::significant_drop_in_scrutinee
 # cargo clippy --all-features -- -D warnings -W clippy::unwrap_used -W clippy::expect_used
 ```
 

src/array/codec/bytes_to_bytes/gzip/gzip_compression_level.rs

@@ -51,7 +51,6 @@ impl GzipCompressionLevel {
     /// Create a new compression level.
     ///
     /// # Errors
-    ///
     /// Errors if `compression_level` is not between 0-9.
     pub fn new<N: num::Unsigned + std::cmp::PartialOrd<u32>>(
         compression_level: N,
@@ -60,7 +59,7 @@ impl GzipCompressionLevel {
         u32: From<N>,
     {
         if compression_level < 10 {
-            Ok(Self(u32::try_from(compression_level).unwrap_or_default()))
+            Ok(Self(u32::from(compression_level)))
         } else {
             Err(compression_level)
         }

src/storage/storage_sync.rs

@@ -57,7 +57,7 @@ pub trait ReadableStorageTraits: Send + Sync {
     ///
     /// # Errors
     ///
-    /// Returns a `StorageError` if the store does not support size() or there is an underlying error with the store.
+    /// Returns a `StorageError` if the store does not support `size()` or there is an underlying error with the store.
     fn size_prefix(&self, prefix: &StorePrefix) -> Result<u64, StorageError>;
 
     /// Return the size in bytes of the value at `key`.
@@ -73,7 +73,7 @@ pub trait ReadableStorageTraits: Send + Sync {
     ///
     /// # Errors
     ///
-    /// Returns a `StorageError` if the store does not support size() or there is an underlying error with the store.
+    /// Returns a `StorageError` if the store does not support `size()` or there is an underlying error with the store.
     fn size(&self) -> Result<u64, StorageError> {
         self.size_prefix(&StorePrefix::root())
     }