lint-based cleanups

demos/AoModel.rb

 #!/usr/bin/env ruby
 
-require 'rubygems'
+require 'rubygems' if RUBY_VERSION =~ /^1\.8/
 require 'simplekit'
 
 # Demonstration model of Operational Availability (Ao).
@@ -9,13 +9,13 @@ class AoModel
   include SimpleKit
 
   # model state
-  attr_reader  :numAvailableJeeps,
+  attr_reader :numAvailableJeeps,
     :numAvailableMechanics,
     :maintenanceQLength,
     :breakdownQLength
 
   # model parameters
-  attr_reader  :maxJeeps,
+  attr_reader :maxJeeps,
     :maxMaintainers,
     :breakdownRate,
     :maintenanceCycleInDays,

demos/MMk.rb

 #!/usr/bin/env ruby
 
-require 'rubygems'
+require 'rubygems' if RUBY_VERSION =~ /^1\.8/
 require 'simplekit'
 
 # Demonstration model of an M/M/k queueing system.  There are k servers
-# and both the arrival and service processes are memoryless (exponential). 
+# and both the arrival and service processes are memoryless (exponential).
 class MMk
   include SimpleKit
 
@@ -76,4 +76,3 @@ end
 
 # Instantiate an MMk object with a particular parameterization and run it.
 MMk.new(4.5, 1.0, 5).run
-

demos/MyModel.rb

 #!/usr/bin/env ruby
 
-require 'rubygems'
+require 'rubygems' if RUBY_VERSION =~ /^1\.8/
 require 'simplekit'
 
 class MyModel
@@ -17,7 +17,6 @@ class MyModel
     schedule(:increment, 1.5)
     printf "%f, %f\n", model_time, @x
   end
-
 end
 
 MyModel.new.run

demos/MyModelArgs.rb

 #!/usr/bin/env ruby
 
-require 'rubygems'
+require 'rubygems' if RUBY_VERSION =~ /^1\.8/
 require 'simplekit'
 
 class MyModel
@@ -17,7 +17,6 @@ class MyModel
     printf "%f, %f, %c\n", model_time, @x, c
     schedule(:halt, 0.0) if model_time > 10
   end
-
 end
 
 MyModel.new.run

simplekit.gemspec

 # -*- ruby -*-
-_VERSION = "0.4.2"
+_VERSION = "0.4.3"
 
 Gem::Specification.new do |s|
   s.name = "simplekit"
   s.version = _VERSION
-  s.date = "2013-04-11"
+  s.date = "2015-05-04"
   s.summary = "Discrete event simulation engine."
   s.homepage = "git://or.nps.edu/simplekit-ruby.git"
   s.email = "pjs@alum.mit.edu"