Fix credo warnings.

lib/ip/address.ex

@@ -267,7 +267,7 @@ defmodule IP.Address do
   """
   @spec to_prefix(t, Prefix.ipv4_prefix_length | Prefix.ipv6_prefix_length) \
     :: Prefix.t
-  def to_prefix(%Address{} = address, length), do: IP.Prefix.new(address, length)
+  def to_prefix(%Address{} = address, length), do: Prefix.new(address, length)
 
   @doc """
   Returns the IP version of the address.
@@ -516,7 +516,8 @@ defmodule IP.Address do
       iex> IP.Address.generate_ula("60:f8:1d:ad:d8:90")
       #IP.Address<fd29:f1ef:86a1::>
   """
-  @spec generate_ula(binary, non_neg_integer, true | false) :: {:ok, t} | {:error, term}
+  @spec generate_ula(binary, non_neg_integer, true | false) :: \
+    {:ok, t} | {:error, term}
   def generate_ula(mac, subnet_id \\ 0, locally_assigned \\ true) do
     with {:ok, address} <- ULA.generate(mac, subnet_id, locally_assigned),
          {:ok, address} <- from_integer(address, 6)

lib/ip/address/ula.ex

@@ -10,7 +10,8 @@ defmodule IP.Address.ULA do
   @doc """
   Generates an IPv6 Unique Local Address
   """
-  @spec generate(binary, non_neg_integer, true | false) :: {:ok, Address.ipv4} | {:error, term}
+  @spec generate(binary, non_neg_integer, true | false) :: \
+    {:ok, Address.ipv4} | {:error, term}
   def generate(mac, subnet_id, locally_assigned)
   when is_binary(mac)
    and is_integer(subnet_id) and subnet_id >= 0 and subnet_id <= 0xffff
@@ -21,7 +22,9 @@ defmodule IP.Address.ULA do
          {:ok, eui}        <- EUI64.eui_portion(mac),
          {:ok, digest}     <- generate_digest(ntp_time, eui),
          {:ok, global_id}  <- last_40_bits_of_digest(digest),
-         {:ok, prefix}     <- generate_address(locally_assigned, subnet_id, global_id)
+         {:ok, prefix}     <- generate_address(locally_assigned,
+                                               subnet_id,
+                                               global_id)
     do
       {:ok, prefix}
     end
@@ -34,7 +37,8 @@ defmodule IP.Address.ULA do
   end
 
   defp generate_digest(ntp_time, eui) do
-    with key    <- << ntp_time::unsigned-integer-size(64), eui::unsigned-integer-size(64) >>,
+    with key    <- << ntp_time::unsigned-integer-size(64),
+                      eui::unsigned-integer-size(64) >>,
          digest <- :crypto.hash(:sha, key),
          digest <- :binary.decode_unsigned(digest)
     do

lib/ip/prefix.ex

@@ -386,12 +386,12 @@ defmodule IP.Prefix do
   @spec usable(t) :: non_neg_integer
   def usable(%Prefix{address: %Address{version: 4}} = prefix) do
     space = prefix
-      |> IP.Prefix.space()
+      |> Prefix.space()
     space - 2
   end
 
   def usable(%Prefix{address: %Address{version: 6}} = prefix) do
-    IP.Prefix.space(prefix)
+    Prefix.space(prefix)
   end
 
 end