Properly implementing Hoe.

The hoe spec says:

  Hoe.spec 'name' do
    self.blah = xyz
  end

I had implemented:

  Hoe.spec 'name' do |spec|
    spec.blah = xyz
  end

The implementation of Hoe.spec uses #instance_eval which, on most Rubies
apparently silently yields self. On MacRuby, however, it doesn't yield
anything, making spec 'nil'. Implementing this properly fixes the basic
Rakefile on MacRuby, but MacRuby still fails the tests because of
problems with RSpec.

Rakefile

@@ -7,19 +7,19 @@ Hoe.plugin :doofus
 Hoe.plugin :gemspec
 Hoe.plugin :git
 
-Hoe.spec 'diff-lcs' do |spec|
-  spec.rubyforge_name = 'ruwiki'
+Hoe.spec 'diff-lcs' do
+  self.rubyforge_name = 'ruwiki'
 
   developer('Austin Ziegler', 'austin@rubyforge.org')
 
-  spec.remote_rdoc_dir = 'diff-lcs/rdoc'
-  spec.rsync_args << ' --exclude=statsvn/'
+  self.remote_rdoc_dir = 'diff-lcs/rdoc'
+  self.rsync_args << ' --exclude=statsvn/'
 
-  spec.history_file = 'History.rdoc'
-  spec.readme_file = 'README.rdoc'
-  spec.extra_rdoc_files = FileList["*.rdoc"].to_a
+  self.history_file = 'History.rdoc'
+  self.readme_file = 'README.rdoc'
+  self.extra_rdoc_files = FileList["*.rdoc"].to_a
 
-  spec.extra_dev_deps << ['rspec', '~> 2.0']
+  self.extra_dev_deps << ['rspec', '~> 2.0']
 end
 
 # vim: syntax=ruby