Rakefile in sinatra-1.2.7 vs Rakefile in sinatra-1.2.8

@@ -183,9 +183,13 @@
     File.open(f.name, 'w') { |io| io.write(spec) }
     puts "updated #{f.name}"
   end
 
   task 'release' => ['test', package('.gem')] do
+    if File.read("CHANGES") =~ /= \d\.\d\.\d . not yet released$/i
+      fail 'please update changes first'
+    end
+
     sh <<-SH
       gem install #{package('.gem')} --local &&
       gem push #{package('.gem')}  &&
       git commit --allow-empty -a -m '#{source_version} release'  &&
       git tag -s v#{source_version} -m '#{source_version} release'  &&