Move spec/rubyspec to spec/ruby for consistency

* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/library/bigdecimal/uplus_spec.rb

@@ -0,0 +1,20 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'bigdecimal'
+
+describe "BigDecimal#+@" do
+  it "returns the same value with same sign (twos complement)" do
+    first = BigDecimal("34.56")
+    first.send(:+@).should == first
+    second = BigDecimal("-34.56")
+    second.send(:+@).should == second
+    third = BigDecimal("0.0")
+    third.send(:+@).should == third
+    fourth = BigDecimal("2E1000000")
+    fourth.send(:+@).should == fourth
+    fifth = BigDecimal("123456789E-1000000")
+    fifth.send(:+@).should == fifth
+  end
+end
+
+
+