Fix logic.

lib/pleroma/web/mastodon_api/views/account_view.ex

@@ -43,8 +43,8 @@ def render("mention.json", %{user: user}) do
   def render("relationship.json", %{user: user, target: target}) do
     %{
       id: target.id,
-      following: User.following?(target, user),
-      followed_by: User.following?(user, target),
+      following: User.following?(user, target),
+      followed_by: User.following?(target, user),
       blocking: false,
       muting: false,
       requested: false,

test/web/mastodon_api/account_view_test.exs

@@ -49,8 +49,8 @@ test "represent a relationship" do
 
     expected = %{
       id: other_user.id,
-      following: false,
-      followed_by: true,
+      following: true,
+      followed_by: false,
       blocking: false,
       muting: false,
       requested: false,