Do not emit { nil => nil } for hash literals anymore

Changelog.md

@@ -1,12 +1,18 @@
-# v0.2.13 2013-01-05
+# v0.2.14 2013-01-09
+
+* [change] Do not emit mutation to { nil => nil } for hash literals
+
+# v0.2.13 2013-01-09
 
 * [fixed] Capture failures that occur in the window between mutation insertion and spec run as kills
 
+[Compare v0.2.12..v0.2.13](https://github.com/mbj/mutant/compare/v0.2.12...v0.2.13)
+
 # v0.2.12 2013-01-03
 
 * [fixed] Do not crash when trying to load methods from precompiled ruby under rbx
 
-[Compare v0.2.10..v0.2.12](https://github.com/mbj/mutant/compare/v0.2.11...v0.2.12)
+[Compare v0.2.11..v0.2.12](https://github.com/mbj/mutant/compare/v0.2.11...v0.2.12)
 
 # v0.2.11 2013-01-03
 

lib/mutant/mutator/node/literal/hash.rb

@@ -59,8 +59,7 @@ module Mutant
           # @api private
           #
           def values
-            nil_node = new_nil
-            [[], [nil_node, nil_node] + dup_array]
+            [[]]
           end
 
           # Emit element presence mutations

spec/unit/mutant/mutator/node/literal/hash_spec.rb

@@ -25,9 +25,6 @@ describe Mutant::Mutator::Node::Literal, 'hash' do
 
     # Empty hash
     mutations << '{}'
-
-    # Extra element
-    mutations << '{nil => nil, true => true, false => false}'
   end
 
   it_should_behave_like 'a mutator'