Merge pull request #425 from jeffcoat/validate_augeas_spec

Fix off-by-one error in validate_augeas_spec.rb that was causing rspec failure

Even without the gem installed always, this is helpful to avoid errors should augeas be enabled/installed due to something else.

spec/functions/validate_augeas_spec.rb

@@ -60,7 +60,7 @@
     end
 
     describe "Nicer Error Messages" do
-      # The intent here is to make sure the function returns the 3rd argument
+      # The intent here is to make sure the function returns the 4th argument
       # in the exception thrown
       inputs = [
         [ "root:x:0:0:root\n", 'Passwd.lns', [], 'Failed to validate passwd content' ],
@@ -69,7 +69,7 @@
 
       inputs.each do |input|
         it "validate_augeas(#{input.inspect}) should fail" do
-          expect { subject.call input }.to raise_error /#{input[2]}/
+          expect { subject.call input }.to raise_error /#{input[3]}/
         end
       end
     end