The switch to URI.escape changes what is escaped

```ruby
[1] pry(main)> URI.escape('home:henne')
=> "home:henne"
[2] pry(main)> CGI.escape('home:henne')
=> "home%3Ahenne"
```

src/api/spec/models/package_spec.rb

@@ -319,17 +319,17 @@
   end
 
   describe '#source_path' do
-    it { expect(package_with_file.source_path).to eq('/source/home:tom/package_with_files') }
-    it { expect(package_with_file.source_path('icon')).to eq('/source/home:tom/package_with_files/icon') }
-    it { expect(package_with_file.source_path('icon', format: :html)).to eq('/source/home:tom/package_with_files/icon?format=html') }
+    it { expect(package_with_file.source_path).to eq('/source/home%3Atom/package_with_files') }
+    it { expect(package_with_file.source_path('icon')).to eq('/source/home%3Atom/package_with_files/icon') }
+    it { expect(package_with_file.source_path('icon', format: :html)).to eq('/source/home%3Atom/package_with_files/icon?format=html') }
   end
 
   describe '#public_source_path' do
-    it { expect(package_with_file.public_source_path).to eq('/public/source/home:tom/package_with_files') }
-    it { expect(package_with_file.public_source_path('icon')).to eq('/public/source/home:tom/package_with_files/icon') }
+    it { expect(package_with_file.public_source_path).to eq('/public/source/home%3Atom/package_with_files') }
+    it { expect(package_with_file.public_source_path('icon')).to eq('/public/source/home%3Atom/package_with_files/icon') }
 
     it 'adds the format parameter to the url that was given to the method' do
-      expect(package_with_file.public_source_path('icon', format: :html)).to eq('/public/source/home:tom/package_with_files/icon?format=html')
+      expect(package_with_file.public_source_path('icon', format: :html)).to eq('/public/source/home%3Atom/package_with_files/icon?format=html')
     end
   end