#Issue Description#
The namespace definition is not changing in the ATOM feed after the first parameter of 'namespace' method in a tokamak file has been changed.
 
#Step-by-step#
**1) **
**Initial tokamak**
describe_collection(@content_collection.content_references) do |collection|
  collection.id = domain_content_collection_url(@content_collection.id)
  collection.title = @content_collection.title
  collection.namespace(:content_collection, domain_content_collections_url, :eager_load => false) do |content_collection|
    content_collection.author = @content_collection.author
    content_collection.status = @content_collection.status
    content_collection.tags = @content_collection.tags
  end

  collection.describe_members do |member, content_reference|
    member.id = content_reference.resource_id
    member.links << link( :rel => :self, :href => member.id )
  end
end 

**ATOM obtained from tokamak above**
<feed xmlns="http://www.w3.org/2005/Atom" xmlns:content_collections="http://local.dataentry.editorial.abril.com.br:3000/content_collections"> 
  <id>http://local.dataentry.editorial.abril.com.br:3000/content_collections/4bd5ffaaa289ba0bb8000003</id> 
  <title>Garret Torp</title> 
  <updated>2010-04-26T18:06:12-03:00</updated> 
  <content_collections:status>scratch</apple_pie:status> 
  <content_collections:author>Araceli Reichert</apple_pie:author> 
  <content_collections:tag>Arlie Schuppe IV</apple_pie:tag> 
  <content_collections:tag>Idella Ratke</apple_pie:tag> 
</feed>


**2)**
Now we changed the symbol passed to 'namespace' method from :content_collection to :apple_pie and render the ATOM again

**Changed tokamak**
describe_collection(@content_collection.content_references) do |collection|
  collection.id = domain_content_collection_url(@content_collection.id)
  collection.title = @content_collection.title
  collection.namespace(:apple_pie, domain_content_collections_url, :eager_load => false) do |content_collection|
    content_collection.author = @content_collection.author
    content_collection.status = @content_collection.status
    content_collection.tags = @content_collection.tags
  end

  collection.describe_members do |member, content_reference|
    member.id = content_reference.resource_id
    member.links << link( :rel => :self, :href => member.id )
  end
end


**ATOM obtained from tokamak above**
  <feed xmlns="http://www.w3.org/2005/Atom" xmlns:content_collections="http://local.dataentry.editorial.abril.com.br:3000/content_collections"> 
    <id>http://local.dataentry.editorial.abril.com.br:3000/content_collections/4bd5ffaaa289ba0bb8000003</id> 
    <title>Garret Torp</title> 
    <updated>2010-04-26T18:06:12-03:00</updated> 
    <apple_pie:status>scratch</apple_pie:status> 
    <apple_pie:author>Araceli Reichert</apple_pie:author> 
    <apple_pie:tag>Arlie Schuppe IV</apple_pie:tag> 
    <apple_pie:tag>Idella Ratke</apple_pie:tag> 
  </feed>
#Conclusion#
The last ATOM should have the namespace name definition as 'xmlns:apple_pie' but it turned out to be 'xmlns:content_collections'