DRY-up SMTP LF workaround

lib/asciinema/emails/email.ex

@@ -5,27 +5,23 @@ defmodule Asciinema.Emails.Email do
   def signup_email(email_address, signup_url) do
     hostname = instance_hostname()
 
-    email =
-      base_email()
-      |> to(email_address)
-      |> subject("Welcome to #{hostname}")
-      |> render("signup.text", signup_url: signup_url, hostname: hostname)
-      |> render("signup.html", signup_url: signup_url, hostname: hostname)
-
-    %{email | text_body: String.replace(email.text_body, "\n", "\r\n")}
+    base_email()
+    |> to(email_address)
+    |> subject("Welcome to #{hostname}")
+    |> render("signup.text", signup_url: signup_url, hostname: hostname)
+    |> render("signup.html", signup_url: signup_url, hostname: hostname)
+    |> fix_text_body()
   end
 
   def login_email(email_address, login_url) do
     hostname = instance_hostname()
 
-    email =
-      base_email()
-      |> to(email_address)
-      |> subject("Login to #{hostname}")
-      |> render("login.text", login_url: login_url, hostname: hostname)
-      |> render("login.html", login_url: login_url, hostname: hostname)
-
-    %{email | text_body: String.replace(email.text_body, "\n", "\r\n")}
+    base_email()
+    |> to(email_address)
+    |> subject("Login to #{hostname}")
+    |> render("login.text", login_url: login_url, hostname: hostname)
+    |> render("login.html", login_url: login_url, hostname: hostname)
+    |> fix_text_body()
   end
 
   def test_email(email_address) do
@@ -56,4 +52,8 @@ defmodule Asciinema.Emails.Email do
   defp instance_hostname do
     System.get_env("URL_HOST") || "localhost"
   end
+
+  defp fix_text_body(email) do
+    %{email | text_body: String.replace(email.text_body, "\n", "\r\n")}
+  end
 end