Changing Pry.config.history.load/save into should_load/should_save to work aroung ActiveSupport 3.1.rc2 hijacking "load"

Changing test_pry.rb to require 'helper' using absolute path, so we can run tests under 1.9.2+

lib/pry/config.rb

@@ -75,9 +75,9 @@ class Pry
     # sub-options include hist.file, hist.load, and hist.save
     # hist.file is the file to save/load history too, e.g
     # Pry.config.history.file = "~/.pry_history".
-    # hist.load is a boolean that determines whether history will be
+    # hist.should_load is a boolean that determines whether history will be
     # loaded from hist.file at session start.
-    # hist.save is a boolean that determines whether history will be
+    # hist.should_save is a boolean that determines whether history will be
     # saved to hist.file at session end.
     # @return [OpenStruct]
     attr_accessor :history

lib/pry/pry_class.rb

@@ -97,7 +97,7 @@ class Pry
       # multiple times per each new session (i.e in debugging)
       load_rc if Pry.config.should_load_rc
       load_plugins if Pry.config.plugins.enabled
-      load_history if Pry.config.history.instance_variable_get("@table")[:load]
+      load_history if Pry.config.history.should_load #.instance_variable_get("@table")[:load]
 
       @initial_session = false
     end
@@ -196,8 +196,8 @@ class Pry
     config.plugins.strict_loading = true
 
     config.history ||= OpenStruct.new
-    config.history.save = true
-    config.history.load = true
+    config.history.should_save = true
+    config.history.should_load = true
     config.history.file = File.expand_path("~/.pry_history")
 
     config.memory_size = 100

lib/pry/pry_instance.rb

@@ -149,7 +149,7 @@ class Pry
       throw :breakout, break_data
     end
 
-    save_history if Pry.config.history.save && finished_top_level_session?
+    save_history if Pry.config.history.should_save && finished_top_level_session?
 
     return_value
   end

test/test_pry.rb

@@ -1,4 +1,4 @@
-require 'helper'
+require File.dirname(File.expand_path(__FILE__)) + '/helper'
 
 puts "Ruby Version #{RUBY_VERSION}"
 puts "Testing Pry #{Pry::VERSION}"