Use 'package' access for newly-promoted-to-public APIs

Author: DougGregor

Sources/PackageModel/ManifestSourceGeneration.swift

@@ -62,8 +62,8 @@ public typealias ManifestCustomProductTypeSourceGenerator = (ProductDescription)
 
 
 /// Convenience initializers for package manifest structures.
-public extension SourceCodeFragment {
-    
+package extension SourceCodeFragment {
+
     /// Instantiates a SourceCodeFragment to represent an entire manifest.
     init(
         from manifest: Manifest,
@@ -633,7 +633,7 @@ public struct SourceCodeFragment {
         self.subnodes = subnodes
     }
 
-    public func generateSourceCode(indent: String = "") -> String {
+    package func generateSourceCode(indent: String = "") -> String {
         var string = literal
         if let subnodes {
             switch delimiters {

Sources/Workspace/Workspace.swift

@@ -96,7 +96,7 @@ public class Workspace {
     public let pinsStore: LoadableResult<PinsStore>
 
     /// The file system on which the workspace will operate.
-    public let fileSystem: any FileSystem
+    package let fileSystem: any FileSystem
 
     /// The host toolchain to use.
     private let hostToolchain: UserToolchain