revert changes to TestSourceKitLSPClient

Author: matthewbastien

Sources/SKTestSupport/TestSourceKitLSPClient.swift

@@ -238,12 +238,12 @@ package final class TestSourceKitLSPClient: MessageHandler, Sendable {
   // MARK: - Sending messages
 
   /// Send the request to `server` and return the request result.
-  package func send<R: RequestType>(_ request: R) async throws(ResponseError) -> R.Response {
-    return try await withCheckedContinuation { continuation in
+  package func send<R: RequestType>(_ request: R) async throws -> R.Response {
+    return try await withCheckedThrowingContinuation { continuation in
       self.send(request) { result in
-        continuation.resume(returning: result)
+        continuation.resume(with: result)
       }
-    }.get()
+    }
   }
 
   /// Variant of `send` above that allows the response to be discarded if it is a `VoidResponse`.

Tests/SourceKitLSPTests/ConvertDocumentationTests.swift

@@ -472,7 +472,7 @@ fileprivate func convertDocumentation(
       )
     } catch {
       XCTFail(
-        "textDocument/convertDocumentation failed at position \(marker): \(error.message)",
+        "textDocument/convertDocumentation failed at position \(marker): \(error.localizedDescription)",
         file: file,
         line: line
       )