Merge pull request #598 from yahonda/diag595

Address #595 by duplicating string objects

Author: rafaelfranca

spec/actions/file_manipulation_spec.rb

@@ -139,7 +139,7 @@ def file
 
     it "accepts http remote sources" do
       body = "__start__\nHTTPFILE\n__end__\n"
-      stub_request(:get, "http://example.com/file.txt").to_return(:body => body)
+      stub_request(:get, "http://example.com/file.txt").to_return(:body => body.dup)
       action :get, "http://example.com/file.txt" do |content|
         expect(a_request(:get, "http://example.com/file.txt")).to have_been_made
         expect(content).to eq(body)
@@ -148,7 +148,7 @@ def file
 
     it "accepts https remote sources" do
       body = "__start__\nHTTPSFILE\n__end__\n"
-      stub_request(:get, "https://example.com/file.txt").to_return(:body => body)
+      stub_request(:get, "https://example.com/file.txt").to_return(:body => body.dup)
       action :get, "https://example.com/file.txt" do |content|
         expect(a_request(:get, "https://example.com/file.txt")).to have_been_made
         expect(content).to eq(body)