1 files changed, 8 insertions, 6 deletions
diff --git a/lib/rubygems/resolver/index_specification.rb b/lib/rubygems/resolver/index_specification.rb
index 9ea76f40ba..7b95608071 100644
--- a/lib/rubygems/resolver/index_specification.rb
+++ b/lib/rubygems/resolver/index_specification.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 ##
 # Represents a possible Specification object returned from IndexSet.  Used to
 # delay needed to download full Specification objects when only the +name+
@@ -21,7 +22,8 @@ class Gem::Resolver::IndexSpecification < Gem::Resolver::Specification
     @name = name
     @version = version
     @source = source
-    @platform = platform.to_s
+    @platform = Gem::Platform.new(platform.to_s)
+    @original_platform = platform.to_s
 
     @spec = nil
   end
@@ -66,21 +68,21 @@ class Gem::Resolver::IndexSpecification < Gem::Resolver::Specification
   end
 
   def inspect # :nodoc:
-    '#<%s %s source %s>' % [self.class, full_name, @source]
+    format("#<%s %s source %s>", self.class, full_name, @source)
   end
 
   def pretty_print(q) # :nodoc:
-    q.group 2, '[Index specification', ']' do
+    q.group 2, "[Index specification", "]" do
       q.breakable
       q.text full_name
 
-      unless Gem::Platform::RUBY == @platform
+      unless @platform == Gem::Platform::RUBY
         q.breakable
         q.text @platform.to_s
       end
 
       q.breakable
-      q.text 'source '
+      q.text "source "
       q.pp @source
     end
   end
@@ -91,7 +93,7 @@ class Gem::Resolver::IndexSpecification < Gem::Resolver::Specification
   def spec # :nodoc:
     @spec ||=
       begin
-        tuple = Gem::NameTuple.new @name, @version, @platform
+        tuple = Gem::NameTuple.new @name, @version, @original_platform
 
         @source.fetch_spec tuple
       end