fix: Fixes failing tests since we create backups now during configuration generation.

Tests/ConfigurationClientTests/ConfigurationClientTests.swift

@@ -35,18 +35,6 @@ struct ConfigurationClientTests: TestCase {
         #expect(FileManager.default.fileExists(atPath: tempFile.cleanFilePath))
         #expect(fileClient.fileExists(tempFile))
         #expect(output == tempFile.cleanFilePath)
-
-        // Ensure that we do not overwrite files if they exist.
-        do {
-          _ = try await configuration.generate(.init(
-            force: false,
-            json: fileName.hasSuffix("json"),
-            path: .file(File(tempFile)!)
-          ))
-          #expect(Bool(false))
-        } catch {
-          #expect(Bool(true))
-        }
       }
     }
   }
@@ -152,7 +140,7 @@ struct ConfigurationClientTests: TestCase {
       try await withGeneratedConfigFile(named: "config.toml", client: client) { configFile in
         @Dependency(\.fileClient) var fileClient
 
-        let backupUrl = configFile.url.appendingPathExtension(".back")
+        let backupUrl = configFile.url.appendingPathExtension("back")
         #expect(fileClient.fileExists(backupUrl) == false)
 
         let config = Configuration()