Minor documentation improvements

Sources/AsyncAlgorithms/AsyncChannel.swift

@@ -13,10 +13,10 @@
 ///
 /// The `AsyncChannel` class is intended to be used as a communication type between tasks,
 /// particularly when one task produces values and another task consumes those values. The back
-///  pressure applied by `send(_:)` and `finish()` via the suspension/resume ensure that
-///  the production of values does not exceed the consumption of values from iteration. Each of these
-///  methods suspends after enqueuing the event and is resumed when the next call to `next()`
-///  on the `Iterator` is made.
+/// pressure applied by `send(_:)` and `finish()` via the suspension/resume ensures that
+/// the production of values does not exceed the consumption of values from iteration. Each of these
+/// methods suspends after enqueuing the event and is resumed when the next call to `next()`
+/// on the `Iterator` is made.
 public final class AsyncChannel<Element: Sendable>: AsyncSequence, Sendable {
   /// The iterator for a `AsyncChannel` instance.
   public struct Iterator: AsyncIteratorProtocol, Sendable {

Sources/AsyncAlgorithms/AsyncChunkedByGroupSequence.swift

@@ -37,6 +37,7 @@ extension AsyncSequence {
 /// error, `AsyncChunkedByGroupSequence` will rethrow that error immediately and discard
 /// any current group.
 ///
+///      let numbers = [10, 20, 30, 10, 40, 40, 10, 20].async
 ///      let chunks = numbers.chunked { $0 <= $1 }
 ///      for await numberChunk in chunks {
 ///        print(numberChunk)