Rake duplicate task descriptions

Using Rake I can define tasks that get added to a collection of tasks for execution.  For example:

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1. desc "one"  
2. task :one do  
3.   puts "one"  
4. end  
5.   
6. desc "all"  
7. task :all => [:one]  
8.   
9. desc "two"  
10. task :two do  
11.   puts "two"  
12. end  
13.   
14. desc "all"  
15. task :all => [:two]  

desc "one"
task :one do
  puts "one"
end

desc "all"
task :all => [:one]

desc "two"
task :two do
  puts "two"
end

desc "all"
task :all => [:two]

Now, if I look at rake --tasks I will see:

> rake --tasks
rake one     # one
rake two     # two
rake all     # all / all

Rake has duplicated the description for the :all task. Looking at the code for Rake I discovered that this can be avoided by terminating the :all task description with a period:

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1. desc "one"  
2. desc "all."  
3. task :all => [:one]  
4.   
5. desc "one"  
6. desc "all."  
7. task :all => [:one]  

desc "one"
desc "all."
task :all => [:one]

desc "one"
desc "all."
task :all => [:one]

> rake --tasks
rake one     # one
rake two     # two
rake all     # all.