Rakefile in ronin-1.5.0 vs Rakefile in ronin-1.5.1

@@ -2,12 +2,12 @@
 
 begin
   require 'bundler'
 rescue LoadError => e
   warn e.message
-  warn "Run `gem install bundler` to install Bundler."
-  exit e.status_code
+  warn "Run `gem install bundler` to install Bundler"
+  exit -1
 end
 
 begin
   Bundler.setup(:development)
 rescue Bundler::BundlerError => e
@@ -18,11 +18,10 @@
 
 require 'rake'
 
 require 'rubygems/tasks'
 Gem::Tasks.new(:sign => {:checksum => true, :pgp => true}) do |tasks|
-  tasks.scm.tag.format  = 'v%s'
   tasks.console.command = 'ripl'
   tasks.console.options = %w[
     -rripl/multi_line
     -rripl/auto_indent
     -rripl/color_result
@@ -78,7 +77,7 @@
 YARD::Rake::YardocTask.new
 
 desc "Generates all documentation"
 task :docs => [:yard, 'dm:doc:graphviz']
 
-require 'md2man/task'
-Md2Man::Task.new
+require 'kramdown/man/task'
+Kramdown::Man::Task.new