DocC for GRDBSendableMetatype

Author: groue

GRDB/Documentation.docc/SwiftConcurrency.md

@@ -229,5 +229,11 @@ Task {
 }
 ```
 
+## Topics
+
+### Supporting Types
+
+- ``GRDBSendableMetatype``
+
 [demo apps]: https://github.com/groue/GRDB.swift/tree/master/Documentation/DemoApps
 [Migrating to Swift 6]: https://www.swift.org/migration/documentation/migrationguide/

GRDB/Utils/Utils.swift

@@ -24,10 +24,12 @@ public func databaseQuestionMarks(count: Int) -> String {
 }
 
 #if compiler(>=6.2)
-/// A synonym for `SendableMetatype` in Swift 6.2, and `Any` otherwise.
+/// A synonym for the standard `SendableMetatype` protocol in Swift 6.2,
+/// and `Any` in previous compiler versions.
 public typealias GRDBSendableMetatype = SendableMetatype
 #else
-/// A synonym for `SendableMetatype` in Swift 6.2, and `Any` otherwise.
+/// A synonym for the standard `SendableMetatype` protocol in Swift 6.2,
+/// and `Any` in previous compiler versions.
 public typealias GRDBSendableMetatype = Any
 #endif