1 files changed, 7 insertions, 9 deletions
diff --git a/lib/rubygems/source/installed.rb b/lib/rubygems/source/installed.rb
index 300491e467..f5c96fee51 100644
--- a/lib/rubygems/source/installed.rb
+++ b/lib/rubygems/source/installed.rb
@@ -1,9 +1,9 @@
 # frozen_string_literal: true
+
 ##
 # Represents an installed gem.  This is used for dependency resolution.
 
 class Gem::Source::Installed < Gem::Source
-
   def initialize # :nodoc:
     @uri = nil
   end
@@ -11,7 +11,7 @@ class Gem::Source::Installed < Gem::Source
   ##
   # Installed sources sort before all other sources
 
-  def <=> other
+  def <=>(other)
     case other
     when Gem::Source::Git,
          Gem::Source::Lock,
@@ -21,21 +21,19 @@ class Gem::Source::Installed < Gem::Source
       0
     when Gem::Source then
       1
-    else
-      nil
     end
   end
 
   ##
   # We don't need to download an installed gem
 
-  def download spec, path
+  def download(spec, path)
     nil
   end
 
-  def pretty_print q # :nodoc:
-    q.text '[Installed]'
+  def pretty_print(q) # :nodoc:
+    q.object_group(self) do
+      q.text "[Installed]"
+    end
   end
-
 end
-