Delete trailing whitespace in AsyncStreamBuffer.swift

Verifying that the ANSI color control sequences don't show up in CI
logs. AsyncStreamBuffer.swift emits warnings, so dirtying it will ensure
it gets rebuilt in CI.

Author: etcwilde

stdlib/public/Concurrency/AsyncStreamBuffer.swift

@@ -112,7 +112,7 @@ extension AsyncStream {
       let handler = state.onTermination
       state.onTermination = nil
       unlock()
-      
+
       // handler must be invoked before yielding nil for termination
       handler?(.cancelled)
 
@@ -124,7 +124,7 @@ extension AsyncStream {
       lock()
       let limit = state.limit
       let count = state.pending.count
-      
+
       if !state.continuations.isEmpty {
         let continuation = state.continuations.removeFirst()
         if count > 0 {
@@ -170,7 +170,7 @@ extension AsyncStream {
           case .bufferingOldest(let limit):
             result = .enqueued(remaining: limit)
           }
-          
+
           unlock()
           continuation.resume(returning: value)
         }
@@ -205,7 +205,7 @@ extension AsyncStream {
       }
       return result
     }
-    
+
     func finish() {
       lock()
       let handler = state.onTermination
@@ -249,9 +249,9 @@ extension AsyncStream {
       } else {
         unlock()
       }
-      
+
     }
-    
+
     func next() async -> Element? {
       await withTaskCancellationHandler { [cancel] in
         cancel()
@@ -289,7 +289,7 @@ extension AsyncThrowingStream {
       case finished
       case failed(Failure)
     }
-    
+
     struct State {
       var continuation: UnsafeContinuation<Element?, Error>?
       var pending = _Deque<Element>()
@@ -345,7 +345,7 @@ extension AsyncThrowingStream {
       let handler = state.onTermination
       state.onTermination = nil
       unlock()
-      
+
       // handler must be invoked before yielding nil for termination
       handler?(.cancelled)
 
@@ -409,7 +409,7 @@ extension AsyncThrowingStream {
           case .bufferingNewest(let limit):
             result = .enqueued(remaining: limit)
           }
-          
+
           state.continuation = nil
           unlock()
           continuation.resume(returning: value)
@@ -445,7 +445,7 @@ extension AsyncThrowingStream {
       }
       return result
     }
-    
+
     func finish(throwing error: __owned Failure? = nil) {
       lock()
       let handler = state.onTermination
@@ -510,7 +510,7 @@ extension AsyncThrowingStream {
         fatalError("attempt to await next() on more than one task")
       }
     }
-    
+
     func next() async throws -> Element? {
       try await withTaskCancellationHandler { [cancel] in
         cancel()
@@ -546,7 +546,7 @@ final class _AsyncStreamCriticalStorage<Contents>: @unchecked Sendable {
   private init(_doNotCallMe: ()) {
     fatalError("_AsyncStreamCriticalStorage must be initialized by create")
   }
-  
+
   private func lock() {
     let ptr =
       UnsafeRawPointer(Builtin.projectTailElems(self, UnsafeRawPointer.self))
@@ -558,15 +558,15 @@ final class _AsyncStreamCriticalStorage<Contents>: @unchecked Sendable {
       UnsafeRawPointer(Builtin.projectTailElems(self, UnsafeRawPointer.self))
     _unlock(ptr)
   }
-  
+
   var value: Contents {
     get {
       lock()
       let contents = _value
       unlock()
       return contents
     }
-    
+
     set {
       lock()
       withExtendedLifetime(_value) {
@@ -575,7 +575,7 @@ final class _AsyncStreamCriticalStorage<Contents>: @unchecked Sendable {
       }
     }
   }
-  
+
   static func create(_ initial: Contents) -> _AsyncStreamCriticalStorage {
     let minimumCapacity = _lockWordCount()
     let storage = Builtin.allocWithTailElems_1(