Fix clippy warnings

Author: rafalh

src/dir.rs

@@ -117,6 +117,7 @@ impl<'a, IO: ReadWriteSeek, TP, OCC> Dir<'a, IO, TP, OCC> {
 
     /// Creates directory entries iterator.
     #[must_use]
+    #[allow(clippy::iter_not_returning_iterator)]
     pub fn iter(&self) -> DirIter<'a, IO, TP, OCC> {
         DirIter::new(self.stream.clone(), self.fs, true)
     }

src/file.rs

@@ -110,7 +110,7 @@ impl<'a, IO: ReadWriteSeek, TP, OCC> File<'a, IO, TP, OCC> {
                          bytes_left -= size;
                          Ok(Extent {
                              offset: fs.offset_from_cluster(cluster),
-                             size: size,
+                             size,
                          })
                      },
                      Err(e) => Err(e),

src/fs.rs

@@ -256,6 +256,7 @@ impl FsOptions<DefaultTimeProvider, LossyOemCpConverter> {
 
 impl<TP: TimeProvider, OCC: OemCpConverter> FsOptions<TP, OCC> {
     /// If enabled accessed date field in directory entry is updated when reading or writing a file.
+    #[must_use]
     pub fn update_accessed_date(mut self, enabled: bool) -> Self {
         self.update_accessed_date = enabled;
         self

src/table.rs

@@ -519,7 +519,7 @@ impl FatTrait for Fat32 {
     {
         let old_reserved_bits = Self::get_raw(fat, cluster)? & 0xF000_0000;
 
-        if value == FatValue::Free && cluster >= 0x0FFF_FFF7 && cluster <= 0x0FFF_FFFF {
+        if value == FatValue::Free && (0x0FFF_FFF7..=0x0FFF_FFFF).contains(&cluster) {
             // NOTE: it is technically allowed for them to store FAT chain loops,
             //       or even have them all store value '4' as their next cluster.
             //       Some believe only FatValue::Bad should be allowed for this edge case.