remove useless newlines after every tag. Make domain.com/username provide opengraph too

lib/pleroma/web/metadata.ex

@@ -7,7 +7,7 @@ def build_tags(params) do
     if(meta_enabled?(:opengraph), do: opengraph_tags(params), else: [])
     |> Enum.map(&to_tag/1)
     |> Enum.map(&HTML.safe_to_string/1)
-    |> Enum.join("\n")
+    |> Enum.join()
   end
 
   def meta_enabled?(type) do
@@ -57,9 +57,11 @@ defp opengraph_tags(%{user: user}) do
       ]
     end
   end
+
   defp opengraph_tags(_) do
     []
   end
+
   def to_tag(data) do
     with {name, attrs, _content = []} <- data do
       HTML.Tag.tag(name, attrs)

lib/pleroma/web/router.ex

@@ -505,7 +505,8 @@ defmodule Pleroma.Web.Router do
 
   scope "/", Fallback do
     get("/registration/:token", RedirectController, :registration_page)
-    get("/*path", RedirectController, :redirector_with_meta)
+    get("/:maybe_nickname_or_id", RedirectController, :redirector_with_meta)
+    get("/*path", RedirectController, :redirector)
 
     options("/*path", RedirectController, :empty)
   end
@@ -514,6 +515,7 @@ defmodule Pleroma.Web.Router do
 defmodule Fallback.RedirectController do
   use Pleroma.Web, :controller
   alias Pleroma.Web.Metadata
+  alias Pleroma.User
 
   def redirector(conn, _params) do
     conn
@@ -521,6 +523,15 @@ def redirector(conn, _params) do
     |> send_file(200, index_file_path())
   end
 
+  def redirector_with_meta(conn, %{"maybe_nickname_or_id" => maybe_nickname_or_id} = params) do
+    with %User{} = user <- User.get_cached_by_nickname_or_id(maybe_nickname_or_id) do
+      redirector_with_meta(conn, %{user: user})
+    else
+      nil ->
+        redirector(conn, params)
+    end
+  end
+
   def redirector_with_meta(conn, params) do
     {:ok, index_content} = File.read(index_file_path())
     tags = Metadata.build_tags(params)