no code action for potentially unformatted line

Author: sheldak

apps/language_server/lib/language_server/providers/code_action/helpers.ex

@@ -15,9 +15,7 @@ defmodule ElixirLS.LanguageServer.Providers.CodeAction.Helpers do
       is_line_formatted =
         unformatted_text
         |> Diff.diff(formatted_text)
-        |> Enum.filter(fn %TextEdit{range: range} ->
-          range["start"]["line"] == changed_line or range["end"]["line"] == changed_line
-        end)
+        |> Enum.filter(&near_changed_line(&1, changed_line))
         |> Enum.empty?()
 
       if is_line_formatted do
@@ -42,6 +40,13 @@ defmodule ElixirLS.LanguageServer.Providers.CodeAction.Helpers do
     end
   end
 
+  defp near_changed_line(%TextEdit{range: range}, changed_line) do
+    changed_line_neighborhood = [changed_line - 1, changed_line, changed_line + 1]
+
+    range["start"]["line"] in changed_line_neighborhood or
+      range["end"]["line"] in changed_line_neighborhood
+  end
+
   @spec update_line(TextEdit.t(), non_neg_integer()) :: TextEdit.t()
   def update_line(
         %TextEdit{range: %{"start" => start_line, "end" => end_line}} = text_edit,