chore: remove redundant words in comment

Signed-off-by: crystalstall <[email protected]>

std/src/ffi/os_str.rs

@@ -550,7 +550,7 @@ impl OsString {
         OsStr::from_inner_mut(self.inner.leak())
     }
 
-    /// Truncate the the `OsString` to the specified length.
+    /// Truncate the `OsString` to the specified length.
     ///
     /// # Panics
     /// Panics if `len` does not lie on a valid `OsStr` boundary

std/src/pipe.rs

@@ -97,7 +97,7 @@ impl PipeReader {
     /// let mut jobs = vec![];
     /// let (reader, mut writer) = std::pipe::pipe()?;
     ///
-    /// // Write NUM_SLOT characters the the pipe.
+    /// // Write NUM_SLOT characters the pipe.
     /// writer.write_all(&[b'|'; NUM_SLOT as usize])?;
     ///
     /// // Spawn several processes that read a character from the pipe, do some work, then

std/src/sync/poison/mutex.rs

@@ -534,7 +534,7 @@ impl<T: ?Sized> Mutex<T> {
     /// # Errors
     ///
     /// If another user of this mutex panicked while holding the mutex, then
-    /// this call will return an error containing the the underlying data
+    /// this call will return an error containing the underlying data
     /// instead.
     ///
     /// # Examples