Small fixes after reviewing recent changes

Author: eregon

core/complex/rect_spec.rb

@@ -7,7 +7,7 @@
 end
 
 describe "Complex.rect" do
-  it "is an alias of Complex#rectangular" do
+  it "is an alias of Complex.rectangular" do
     Complex.method(:rect).should == Complex.method(:rectangular)
   end
 end

core/struct/deconstruct_spec.rb

@@ -1,7 +1,7 @@
 require_relative '../../spec_helper'
 
 describe "Struct#deconstruct" do
-  it "is an alias for Struct#to_a" do
+  it "is an alias of Struct#to_a" do
     Struct.instance_method(:deconstruct).should == Struct.instance_method(:to_a)
   end
 end

core/struct/size_spec.rb

@@ -3,8 +3,9 @@
 require_relative 'shared/accessor'
 
 describe "Struct#size" do
-  it "is a synonym for length" do
-    StructClasses::Car.new.size.should == StructClasses::Car.new.length
+  it "returns the number of attributes" do
+    StructClasses::Car.new('Cadillac', 'DeVille').length.should == 3
+    StructClasses::Car.new.length.should == 3
   end
 
   it_behaves_like :struct_accessor, :size

core/symbol/to_sym_spec.rb

@@ -3,7 +3,7 @@
 describe "Symbol#to_sym" do
   it "returns self" do
     [:rubinius, :squash, :[], :@ruby, :@@ruby].each do |sym|
-      sym.to_sym.should == sym
+      sym.to_sym.should.equal?(sym)
     end
   end
 end

language/predefined_spec.rb

@@ -1103,7 +1103,7 @@ def obj.foo2; yield; end
 end
 
 describe "Global variable $\"" do
-  it "is an alias for $LOADED_FEATURES" do
+  it "is an alias of $LOADED_FEATURES" do
     $".should.equal? $LOADED_FEATURES
   end