fix 5.10 compile on Ubuntu 24.04 (Noble) for Intel (x86_64) (#810)

Specifically Swift 5.10 _on Intel on Ubuntu Noble (24.04)_ has a crazy bug which leads to compilation failures in a `#if compiler(>=6.0)` block: swiftlang/swift#79285 . This workaround fixes the compilation by _changing the whitespace_. Thanks @gwynne for finding this workaround! --------- Co-authored-by: Johannes Weiss <johannes@jweiss.io>

Author: weissi

Sources/AsyncHTTPClient/StructuredConcurrencyHelpers.swift

@@ -11,15 +11,18 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 //===----------------------------------------------------------------------===//
+// swift-format-ignore
+// Note: Whitespace changes are used to workaround compiler bug
+// https://github.com/swiftlang/swift/issues/79285
 
 #if compiler(>=6.0)
 @inlinable
 @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
 internal func asyncDo<R>(
  isolation: isolated (any Actor)? = #isolation,
- _ body: () async throws -> sending R,
- finally: sending @escaping ((any Error)?) async throws -> Void
-) async throws -> sending R {
+ // DO NOT FIX THE WHITESPACE IN THE NEXT LINE UNTIL 5.10 IS UNSUPPORTED
+ // https://github.com/swiftlang/swift/issues/79285
+ _ body: () async throws -> sending R, finally: sending @escaping ((any Error)?) async throws -> Void) async throws -> sending R {
  let result: R
  do {
  result = try await body()