breaks compile by removing non-redundant imports

I have imports

import Svg
import Svg.Attributes as Svg
import Svg.Attributes

and access most attributes as `Svg.`. But both `Svg` and `Svg.Attributes` define `style`, so I need the third import to be able to access `Svg.Attributes.Style` explicitly. `elm-format` however removes that import statement, converting compiling elm code to non-compiling elm-code.

(Yes, that import situation is a bit messy; it seems that the real `Svg.style` isn't accessible at all anymore.)

Start by reproducing the three-import Elm example from the issue and compare elm-format's output with the compiler result. Trace the import-formatting behavior responsible for removing the explicit Svg.Attributes import, and consider the issue done when the formatted example still compiles and preserves the needed import.

Written by the indexing model from the issue text.