Use existing import for code action

[nyarly]

When ELS suggests e.g. Import 'button' from module 'Html', if the Html module is already imported, the exposing (button) should be added to the existing import, not added as a new import Html

Expected Behavior

Given

import Html exposing (div)

foo = 
  button [] []

triggering a code action on button and selecting Import 'button' from module "Html" should result in

import Html exposing (div, button)

foo =
  button [] []

Current Behavior

Instead we get:

import Html exposing (div)
import Html exposing (button)

Context

The resulting imports look sloppy and are hard to follow. I wind up spending as much time tiding them up as I save using the auto-import action.

Your Environment

• Version used: 2.8.0
• Editor used: Neovim 0.10.1
• Environment name and version (e.g. node.js 5.4): node 22.5.1
• Operating System and version: NixOS 24.05

[razzeee]

You should be running elm-format with this. It will automatically combine them.