Improve description from such_that

The "such that" prefix on the #such_that matcher didn't help in the
description when writing ad-hoc matchers. This removes that prefix,
which should allow for more natural descriptions.

lib/ramcrest/such_that.rb

@@ -4,22 +4,20 @@ module Ramcrest
   module SuchThat
   module_function
 
-    def such_that(description = "<anonymous>", &matcher_block)
+    def such_that(description = "<anonymous such_that>", &matcher_block)
       Matcher.new(description, matcher_block)
     end
 
     class Matcher
       include Ramcrest::Matcher
 
+      attr_reader :description
+
       def initialize(description, matcher_block)
         singleton = class << self; self; end
         singleton.send(:define_method, :matches?, matcher_block)
         @description = description
       end
-
-      def description
-        "such that #{@description}"
-      end
     end
   end
 end

test/such_that_test.rb

@@ -14,7 +14,7 @@
   end
 
   it "describes itself by default as an anonymous matcher" do
-    assert_that such_that { |value| }, a_matcher_described_as("such that <anonymous>")
+    assert_that such_that { |value| }, a_matcher_described_as("<anonymous such_that>")
   end
 
   it "allows for composing with other such_that matchers" do
@@ -27,6 +27,6 @@
 
   it "can have a description provided" do
     assert_that such_that("something is true") { |value| },
-      a_matcher_described_as("such that something is true")
+      a_matcher_described_as("something is true")
   end
 end