How to add documentation or comment to RakeFile

I have one Rakefile:

desc 'submodulePull'
task :submodulePull do
  sh 'git submodule update'
  sh 'git submodule foreach git pull'
end

      

        
        
        
      

    

I want to add a description of how subodulePull works.

How to add documentation / comment / description of a command to RakeFile that should be ignored by the @run time compiler.