Add more rspec snippets.

snippets/ruby.snippets

@@ -910,6 +910,8 @@ snippet it
 snippet itp
 	it "${1:spec_name}"
 	${2}
+snippet its
+	its(:${1:method}) { should ${2} }
 snippet desc
 	describe ${1:class_name} do
 		${2}
@@ -926,3 +928,9 @@ snippet aft
 	after :${1:each} do
 		${2}
 	end
+snippet let
+	let(:${1:method}) { ${2} }
+snippet subj
+	subject { ${1} }
+snippet spec
+	specify { subject.${1} }