- 5f78451 introduced a change to keep the filename extension when creating the tempfile
- `Tempfile#path` is now returning the filename with the extension followed by random chars and the extension again
```ruby
puts Rack::Test::UploadedFile.new('foo.txt').path # => '/var/xxx/foo.txt2017-30-08-dsad.txt'
```
- This PR modifies this behaviour to not include the file extension as part of the file basename when creating the Tempfile