Add test for optional trailing period in Styleguide reference.

test/fixtures/css/buttons.css

@@ -37,6 +37,14 @@ a.button.star {
   a.button.star.disabled {
     opacity: 0.5; }
 
+/*
+Test that trailing period is stripped from the reference.
+
+Styleguide 2.2.2.
+*/
+a.button.trailing:after {
+  content: '.'; }
+
 /*
 A big button
 

test/parser_test.rb

@@ -50,6 +50,11 @@ def setup
       @css_parsed.section('2.1.1').description
   end
 
+  test "parses KSS keys that have a trailing period" do
+    assert_equal 'Test that trailing period is stripped from the reference.',
+      @css_parsed.section('2.2.2').description
+  end
+
   test "parses KSS keys that are words in CSS" do
     assert_equal 'A big button',
       @css_parsed.section('Buttons.Big').description
@@ -76,7 +81,7 @@ def setup
   end
 
   test "public sections returns hash of sections" do
-    assert_equal 5, @css_parsed.sections.count
+    assert_equal 6, @css_parsed.sections.count
   end
 
   test "parse multiple paths" do