Support stepped range syntax (#1346)

Author: eksperimental

lib/ex_doc/autolink.ex

@@ -248,6 +248,9 @@ defmodule ExDoc.Autolink do
       ["", "", ""] ->
         {:local, :..}
 
+      ["//", "", ""] ->
+        {:local, :"..//"}
+
       ["", ""] ->
         {:local, :.}
 

test/ex_doc/autolink_test.exs

@@ -106,6 +106,12 @@ defmodule ExDoc.AutolinkTest do
 
       assert autolink("for/1", apps: [:elixir]) ==
                ~m"[`for/1`](Kernel.SpecialForms.html#for/1)"
+
+      # TODO: Remove check once Elixir v1.12+ is required
+      if Version.match?(System.version(), ">= 1.12.0-rc.0") do
+        assert autolink("..///3") ==
+                 ~m"[`..///3`](https://hexdocs.pm/elixir/Kernel.html#..///3)"
+      end
     end
 
     test "elixir callback" do