clippy: fix "hiding a lifetime" warnings

from mismatched_lifetime_syntaxes lint

Author: cakebaker

src/uu/chcon/src/chcon.rs

@@ -794,7 +794,7 @@ enum SELinuxSecurityContext<'t> {
 }
 
 impl SELinuxSecurityContext<'_> {
-    fn to_c_string(&self) -> Result<Option<Cow<CStr>>> {
+    fn to_c_string(&self) -> Result<Option<Cow<'_, CStr>>> {
         match self {
             Self::File(context) => context
                 .to_c_string()

src/uu/chcon/src/fts.rs

@@ -61,7 +61,7 @@ impl FTS {
         })
     }
 
-    pub(crate) fn last_entry_ref(&mut self) -> Option<EntryRef> {
+    pub(crate) fn last_entry_ref(&mut self) -> Option<EntryRef<'_>> {
         self.entry.map(move |entry| EntryRef::new(self, entry))
     }
 

src/uu/csplit/src/csplit.rs

@@ -239,7 +239,7 @@ impl Drop for SplitWriter<'_> {
 }
 
 impl SplitWriter<'_> {
-    fn new(options: &CsplitOptions) -> SplitWriter {
+    fn new(options: &CsplitOptions) -> SplitWriter<'_> {
         SplitWriter {
             options,
             counter: 0,

src/uu/cut/src/cut.rs

@@ -404,7 +404,7 @@ fn cut_files(mut filenames: Vec<String>, mode: &Mode) {
 
 /// Get delimiter and output delimiter from `-d`/`--delimiter` and `--output-delimiter` options respectively
 /// Allow either delimiter to have a value that is neither UTF-8 nor ASCII to align with GNU behavior
-fn get_delimiters(matches: &ArgMatches) -> UResult<(Delimiter, Option<&[u8]>)> {
+fn get_delimiters(matches: &ArgMatches) -> UResult<(Delimiter<'_>, Option<&[u8]>)> {
     let whitespace_delimited = matches.get_flag(options::WHITESPACE_DELIMITED);
     let delim_opt = matches.get_one::<OsString>(options::DELIMITER);
     let delim = match delim_opt {

src/uu/od/src/input_decoder.rs

@@ -44,7 +44,7 @@ impl<I> InputDecoder<'_, I> {
         normal_length: usize,
         peek_length: usize,
         byte_order: ByteOrder,
-    ) -> InputDecoder<I> {
+    ) -> InputDecoder<'_, I> {
         let bytes = vec![0; normal_length + peek_length];
 
         InputDecoder {
@@ -64,7 +64,7 @@ where
 {
     /// calls `peek_read` on the internal stream to (re)fill the buffer. Returns a
     /// `MemoryDecoder` providing access to the result or returns an i/o error.
-    pub fn peek_read(&mut self) -> io::Result<MemoryDecoder> {
+    pub fn peek_read(&mut self) -> io::Result<MemoryDecoder<'_>> {
         match self
             .input
             .peek_read(self.data.as_mut_slice(), self.reserved_peek_length)

src/uu/od/src/od.rs

@@ -603,7 +603,7 @@ fn open_input_peek_reader(
     input_strings: &[String],
     skip_bytes: u64,
     read_bytes: Option<u64>,
-) -> PeekReader<BufReader<PartialReader<MultifileReader>>> {
+) -> PeekReader<BufReader<PartialReader<MultifileReader<'_>>>> {
     // should return  "impl PeekRead + Read + HasError" when supported in (stable) rust
     let inputs = input_strings
         .iter()

src/uu/od/src/output_info.rs

@@ -47,7 +47,7 @@ pub struct OutputInfo {
 
 impl OutputInfo {
     /// Returns an iterator over the `SpacedFormatterItemInfo` vector.
-    pub fn spaced_formatters_iter(&self) -> Iter<SpacedFormatterItemInfo> {
+    pub fn spaced_formatters_iter(&self) -> Iter<'_, SpacedFormatterItemInfo> {
         self.spaced_formatters.iter()
     }
 

src/uu/runcon/src/runcon.rs

@@ -282,7 +282,7 @@ fn get_plain_context(context: &OsStr) -> Result<OpaqueSecurityContext> {
         .map_err(|r| Error::from_selinux("runcon-operation-creating-context", r))
 }
 
-fn get_transition_context(command: &OsStr) -> Result<SecurityContext> {
+fn get_transition_context(command: &OsStr) -> Result<SecurityContext<'_>> {
     // Generate context based on process transition.
     let sec_class = SecurityClass::from_name("process")
         .map_err(|r| Error::from_selinux("runcon-operation-getting-process-class", r))?;

src/uu/sort/src/chunks.rs

@@ -88,10 +88,11 @@ impl Chunk {
         }
     }
 
-    pub fn lines(&self) -> &Vec<Line> {
+    pub fn lines(&self) -> &Vec<Line<'_>> {
         &self.borrow_dependent().lines
     }
-    pub fn line_data(&self) -> &LineData {
+
+    pub fn line_data(&self) -> &LineData<'_> {
         &self.borrow_dependent().line_data
     }
 }

src/uu/sort/src/merge.rs

@@ -144,7 +144,7 @@ pub fn merge_with_file_limit<
 fn merge_without_limit<M: MergeInput + 'static, F: Iterator<Item = UResult<M>>>(
     files: F,
     settings: &GlobalSettings,
-) -> UResult<FileMerger> {
+) -> UResult<FileMerger<'_>> {
     let (request_sender, request_receiver) = channel();
     let mut reader_files = Vec::with_capacity(files.size_hint().0);
     let mut loaded_receivers = Vec::with_capacity(files.size_hint().0);