style: fix code formatting in tests

- Fix indentation and spacing in User-Agent tests

Co-authored-by: Claude Code <noreply@anthropic.com>

Author: emyller

test/flagsmith_client_test.exs

@@ -441,10 +441,10 @@ defmodule Flagsmith.Client.Test do
   describe "User-Agent header" do
     test "user_agent/0 returns version from application spec" do
       user_agent = Flagsmith.Client.user_agent()
-      
+
       # Should match the format "flagsmith-elixir-sdk/<version>" or "flagsmith-elixir-sdk/unknown"
       assert user_agent =~ ~r/^flagsmith-elixir-sdk\/.+$/
-      
+
       # In test environment, it should return the actual version from mix.exs
       # or "unknown" if not available
       case Application.spec(:flagsmith_engine, :vsn) do
@@ -456,14 +456,15 @@ defmodule Flagsmith.Client.Test do
     test "HTTP client includes User-Agent header in requests", %{config: config} do
       expect(Tesla.Adapter.Mock, :call, fn tesla_env, _options ->
         # Assert that the User-Agent header is present
-        user_agent_header = Enum.find(tesla_env.headers, fn {header, _} ->
-          header == "user-agent"
-        end)
-        
+        user_agent_header =
+          Enum.find(tesla_env.headers, fn {header, _} ->
+            header == "user-agent"
+          end)
+
         assert user_agent_header != nil, "User-Agent header should be present"
         {_header, user_agent_value} = user_agent_header
         assert user_agent_value =~ ~r/^flagsmith-elixir-sdk\/.+$/
-        
+
         {:ok, %Tesla.Env{status: 200, body: Test.Generators.map_env()}}
       end)