chore: char list linting

lib/tilex/notifications/notifiers/slack.ex

@@ -45,7 +45,7 @@ defmodule Tilex.Notifications.Notifiers.Slack do
   defp send_slack_message(message, http) do
     message = String.replace(message, "\"", "'")
     endpoint = slack_endpoint() |> String.to_charlist()
-    request = {endpoint, [], 'application/json', "{\"text\": \"#{message}\"}"}
+    request = {endpoint, [], ~c"application/json", "{\"text\": \"#{message}\"}"}
     http.request(:post, request, [], [])
   end
 

test/controllers/stats_controller_test.exs

@@ -1,7 +1,7 @@
 defmodule Tilex.StatsControllerTest do
   use TilexWeb.ConnCase, async: true
 
-  test 'developer/2 redirects to stats index when unauthenticated', %{conn: conn} do
+  test ~c"developer/2 redirects to stats index when unauthenticated", %{conn: conn} do
     response = get(conn, Routes.stats_path(conn, :developer))
     assert html_response(response, 302)
   end

test/features/developer_signs_out_test.exs

@@ -1,7 +1,7 @@
 defmodule Features.DeveloperSignsOutTest do
   use Tilex.IntegrationCase, async: true
 
-  test 'signs out and sees a flash message', %{:session => session} do
+  test ~c"signs out and sees a flash message", %{:session => session} do
     developer = Factory.insert!(:developer)
 
     session

test/support/pages/create_post_page.ex

@@ -32,7 +32,7 @@ defmodule Tilex.Integration.Pages.CreatePostPage do
 
   def click_cancel(session) do
     session
-    |> click(Query.link('cancel'))
+    |> click(Query.link(~c"cancel"))
   end
 
   def expect_form_has_error(session, error_text) do

test/tilex/notifications/notifiers/slack_test.exs

@@ -9,7 +9,7 @@ defmodule Tilex.Notifications.Notifiers.SlackTest do
   defmodule HTTPMock do
     def request(
           :post,
-          {'https://slack.test.com/abc/123', [], 'application/json', payload},
+          {~c"https://slack.test.com/abc/123", [], ~c"application/json", payload},
           [],
           []
         ) do