diff --git a/lib/auto_linker/builder.ex b/lib/auto_linker/builder.ex
index e2c0ec0..c2d3799 100644
--- a/lib/auto_linker/builder.ex
+++ b/lib/auto_linker/builder.ex
@@ -59,7 +59,7 @@ defmodule AutoLinker.Builder do
       |> truncate(Map.get(opts, :truncate, false))
 
     attrs = format_attrs(attrs)
-    "<a #{attrs}>" <> url <> "</a>"
+    "<a #{attrs}>#{url}</a>"
   end
 
   defp format_attrs(attrs) do
@@ -93,9 +93,7 @@ defmodule AutoLinker.Builder do
 
   defp strip_prefix(url, _), do: url
 
-  def create_phone_link([], buffer, _) do
-    buffer
-  end
+  def create_phone_link([], buffer, _), do: buffer
 
   def create_phone_link([h | t], buffer, opts) do
     create_phone_link(t, format_phone_link(h, buffer, opts), opts)