Fix typos

spec/ruby/core/module/attr_accessor_spec.rb

@@ -76,7 +76,7 @@ describe "Module#attr_accessor" do
   end
 
   ruby_version_is "3.0" do
-    it "returns an array of defined methods names as symbols" do
+    it "returns an array of defined method names as symbols" do
       Class.new do
         (attr_accessor :foo, 'bar').should == [:foo, :foo=, :bar, :bar=]
       end

spec/ruby/core/module/attr_reader_spec.rb

@@ -71,7 +71,7 @@ describe "Module#attr_reader" do
   end
 
   ruby_version_is "3.0" do
-    it "returns an array of defined methods names as symbols" do
+    it "returns an array of defined method names as symbols" do
       Class.new do
         (attr_reader :foo, 'bar').should == [:foo, :bar]
       end

spec/ruby/core/module/attr_spec.rb

@@ -157,7 +157,7 @@ describe "Module#attr" do
   end
 
   ruby_version_is "3.0" do
-    it "returns an array of defined methods names as symbols" do
+    it "returns an array of defined method names as symbols" do
       Class.new do
         (attr :foo, 'bar').should == [:foo, :bar]
         (attr :baz, false).should == [:baz]

spec/ruby/core/module/attr_writer_spec.rb

@@ -71,7 +71,7 @@ describe "Module#attr_writer" do
   end
 
   ruby_version_is "3.0" do
-    it "returns an array of defined methods names as symbols" do
+    it "returns an array of defined method names as symbols" do
       Class.new do
         (attr_writer :foo, 'bar').should == [:foo=, :bar=]
       end