Merge pull request #2654 from nathawes/fixup-test-for-parser-diagnostics-change

[test] Update PD5LoadingTests.swift for an upcoming parser fix that suppressed a diagnostic it was checking for.

Author: Nathan Hawes

Tests/PackageLoadingTests/PD5LoadingTests.swift

@@ -328,7 +328,7 @@ class PackageDescription5LoadingTests: PackageDescriptionLoadingTests {
                     packageKind: .local
                 )
             } catch ManifestParseError.invalidManifestFormat(let error, let diagnosticFile) {
-                XCTAssertMatch(error, .contains("expected \')\' in expression list"))
+                XCTAssertMatch(error, .contains("expected expression in container literal"))
                 let contents = try localFileSystem.readFileContents(diagnosticFile!)
                 XCTAssertNotNil(contents)
             }