Merge pull request #970 from DanielleSucher/fix-issue-956

Have show-doc suggest installing pry-doc in Ruby 2.0

lib/pry/helpers/base_helpers.rb

@@ -88,22 +88,26 @@ class Pry
       end
 
       def jruby_19?
-        RbConfig::CONFIG['ruby_install_name'] == 'jruby' &&
-          RbConfig::CONFIG['ruby_version'] == '1.9'
+        jruby? && RbConfig::CONFIG['ruby_version'] == '1.9'
       end
 
       def rbx?
         RbConfig::CONFIG['ruby_install_name'] == 'rbx'
       end
 
+      def mri?
+        RbConfig::CONFIG['ruby_install_name'] == 'ruby'
+      end
+
       def mri_18?
-        RUBY_VERSION =~ /1.8/ && RbConfig::CONFIG['ruby_install_name'] == 'ruby'
+        mri? && RUBY_VERSION =~ /1.8/
       end
 
       def mri_19?
-        RUBY_VERSION =~ /1.9/ && RbConfig::CONFIG['ruby_install_name'] == 'ruby'
+        mri? && RUBY_VERSION =~ /1.9/ 
       end
 
+
       # Try to use `less` for paging, if it fails then use
       # simple_pager. Also do not page if Pry.pager is falsey
       def stagger_output(text, out = nil)

lib/pry/method.rb

@@ -473,7 +473,7 @@ class Pry
         Pry::MethodInfo.info_for(@method) or raise CommandError, "Cannot locate this method: #{name}. (source_location returns nil)"
       else
         fail_msg = "Cannot locate this method: #{name}."
-        if mri_18? || mri_19?
+        if mri?
           fail_msg += ' Try `gem-install pry-doc` to get access to Ruby Core documentation.'
         end
         raise CommandError, fail_msg