diff --git a/lib/xcodeproj/project/object/swift_package_remote_reference.rb b/lib/xcodeproj/project/object/swift_package_remote_reference.rb
index abd6c3ae..5abdaabb 100644
--- a/lib/xcodeproj/project/object/swift_package_remote_reference.rb
+++ b/lib/xcodeproj/project/object/swift_package_remote_reference.rb
@@ -18,7 +18,7 @@ class XCRemoteSwiftPackageReference < AbstractObject
         #--------------------------------------#
 
         def ascii_plist_annotation
-          " #{isa} \"#{File.basename(display_name,".git")}\" "
+          " #{isa} \"#{File.basename(display_name, '.git')}\" "
         end
 
         # @return [String] the name of the remote Swift package reference.