chore: fix several typos in tracing-core and tracing-subscriber (#1601)

tracing-core/src/subscriber.rs

@@ -101,7 +101,7 @@ pub trait Subscriber: 'static {
  ///
  /// `Subscriber`s which require their filters to be run every time an event
  /// occurs or a span is entered/exited should return `Interest::sometimes`.
- /// If a subscriber returns `Interest::sometimes`, then its' [`enabled`] method
+ /// If a subscriber returns `Interest::sometimes`, then its [`enabled`] method
  /// will be called every time an event or span is created from that callsite.
  ///
  /// For example, suppose a sampling subscriber is implemented by
@@ -363,7 +363,7 @@ pub trait Subscriber: 'static {
  #[deprecated(since = "0.1.2", note = "use `Subscriber::try_close` instead")]
  fn drop_span(&self, _id: span::Id) {}
 
- /// Notifies the subscriber that a [`span ID`] has been dropped, and returns
+ /// Notifies the subscriber that a [span ID] has been dropped, and returns
  /// `true` if there are now 0 IDs that refer to that span.
  ///
  /// Higher-level libraries providing functionality for composing multiple

tracing-subscriber/src/layer/mod.rs

@@ -6,7 +6,7 @@
 //! complete strategy for collecting traces; but it _also_ means that the
 //! `Subscriber` trait cannot easily be composed with other `Subscriber`s.
 //!
-//! In particular, [`Subscriber`]'s are responsible for generating [span IDs] and
+//! In particular, [`Subscriber`]s are responsible for generating [span IDs] and
 //! assigning them to spans. Since these IDs must uniquely identify a span
 //! within the context of the current trace, this means that there may only be
 //! a single `Subscriber` for a given thread at any point in time —