fix: Don't remove double newlines from generated docs

Removing double newlines breaks formatting in e.g. the generated browser docs,
and breaks doctests, since they expect the example code sections to be separated
by the rest of the comments by double newlines.

Fixes: #2433

Author: Munksgaard

lib/ash/code_interface.ex

@@ -465,7 +465,6 @@ defmodule Ash.CodeInterface do
 
              #{interface_options.docs()}
              """
-             |> Ash.CodeInterface.trim_double_newlines()
         @doc spark_opts: [
                {opts_location, interface_options.schema()}
              ]
@@ -531,7 +530,6 @@ defmodule Ash.CodeInterface do
 
              #{interface_options.docs()}
              """
-             |> Ash.CodeInterface.trim_double_newlines()
         @doc spark_opts: [
                {opts_location, interface_options.schema()}
              ]
@@ -1651,7 +1649,6 @@ defmodule Ash.CodeInterface do
 
              #{interface_options.docs()}
              """
-             |> Ash.CodeInterface.trim_double_newlines()
 
         @doc spark_opts: [
                {first_opts_location, interface_options.schema()},
@@ -1683,7 +1680,6 @@ defmodule Ash.CodeInterface do
 
              #{interface_options.docs()}
              """
-             |> Ash.CodeInterface.trim_double_newlines()
 
         @doc spark_opts: [
                {first_opts_location, interface_options.schema()},
@@ -1728,7 +1724,6 @@ defmodule Ash.CodeInterface do
 
                #{Spark.Options.docs(subject_opts)}
                """
-               |> Ash.CodeInterface.trim_double_newlines()
           @doc spark_opts: [
                  {first_opts_location, subject_opts},
                  {first_opts_location + 1, subject_opts}
@@ -1754,7 +1749,6 @@ defmodule Ash.CodeInterface do
 
              #{Ash.Resource.Interface.CanOpts.docs()}
              """
-             |> Ash.CodeInterface.trim_double_newlines()
         @dialyzer {:nowarn_function, {:"can_#{interface.name}", length(common_args) + 3}}
         @doc spark_opts: [
                {first_opts_location + 1, Ash.Resource.Interface.CanOpts.schema()},
@@ -1842,7 +1836,6 @@ defmodule Ash.CodeInterface do
 
              #{Ash.Resource.Interface.CanQuestionMarkOpts.docs()}
              """
-             |> Ash.CodeInterface.trim_double_newlines()
         def unquote(:"can_#{interface.name}?")(
               actor,
               unquote_splicing(common_args),
@@ -2299,13 +2292,6 @@ defmodule Ash.CodeInterface do
     end
   end
 
-  @doc false
-  def trim_double_newlines(str) do
-    str
-    |> String.replace(~r/\n{2,}/, "\n")
-    |> String.trim_trailing()
-  end
-
   @doc false
   def bulk_query(resource, method, id) do
     case method do