add .formatter.exs + format

lib/koans/17_agents.ex

@@ -5,36 +5,38 @@ defmodule Agents do
 
   koan "Agents maintain state, so you can ask them about it" do
     {:ok, pid} = Agent.start_link(fn -> "Hi there" end)
-    assert Agent.get(pid, &(&1)) == ___
+    assert Agent.get(pid, & &1) == ___
   end
 
   koan "Agents may also be named so that you don't have to keep the pid around" do
     Agent.start_link(fn -> "Why hello" end, name: AgentSmith)
-    assert Agent.get(AgentSmith, &(&1)) == ___
+    assert Agent.get(AgentSmith, & &1) == ___
   end
 
   koan "Update to update the state" do
-    Agent.start_link(fn() -> "Hi there" end, name: __MODULE__)
+    Agent.start_link(fn -> "Hi there" end, name: __MODULE__)
 
-    Agent.update(__MODULE__, fn(old) ->
+    Agent.update(__MODULE__, fn old ->
       String.upcase(old)
     end)
-    assert Agent.get(__MODULE__, &(&1)) == ___
+
+    assert Agent.get(__MODULE__, & &1) == ___
   end
 
   koan "Use get_and_update when you need to read and change a value in one go" do
-    Agent.start_link(fn() -> ["Milk"] end, name: __MODULE__)
+    Agent.start_link(fn -> ["Milk"] end, name: __MODULE__)
 
-    old_list = Agent.get_and_update(__MODULE__, fn(old) ->
-      {old, ["Bread" | old]}
-    end)
+    old_list =
+      Agent.get_and_update(__MODULE__, fn old ->
+        {old, ["Bread" | old]}
+      end)
 
     assert old_list == ___
-    assert Agent.get(__MODULE__, &(&1)) == ___
+    assert Agent.get(__MODULE__, & &1) == ___
   end
 
   koan "Somebody has to switch off the light at the end of the day" do
-    {:ok, pid} = Agent.start_link(fn() -> ["Milk"] end, name: __MODULE__)
+    {:ok, pid} = Agent.start_link(fn -> ["Milk"] end, name: __MODULE__)
 
     Agent.stop(__MODULE__)