fix link parsing

lib/textile/lexer.ex

@@ -123,8 +123,8 @@ defmodule Textile.Lexer do
   {link_markup_start, link_markup_element} = markup_ending_in(string("\""))
 
   link_stop =
+    repeat(
       choice([
-      space(),
         string("*"),
         string("_"),
         string("@"),
@@ -135,8 +135,10 @@ defmodule Textile.Lexer do
         string("."),
         string("?"),
         string("!"),
-      string(",")
+        string(","),
       ])
+    )
+    |> choice([space(), eos()])
 
   link_contents_start =
     choice([

lib/textile/parser.ex

@@ -179,7 +179,7 @@ defmodule Textile.Parser do
   #   link_start well_formed_including_paragraphs link_end link_url;
   #
   defp link(parser, [{:link_start, start} | r_tokens]) do
-    case well_formed_including_paragraphs(parser, nil, r_tokens) do
+    case well_formed_including_paragraphs(parser, :link_end, r_tokens) do
       {:ok, tree, [{:link_end, _end}, {:link_url, url} | r2_tokens]} ->
         {:ok, [{:markup, ~s|<a href="#{escape_html(url)}">|}, tree, {:markup, ~s|</a>|}], r2_tokens}
 

lib/textile/url_lexer.ex

@@ -2,13 +2,24 @@ defmodule Textile.UrlLexer do
   import NimbleParsec
 
   def url_ending_in(ending_sequence) do
-    protocol =
+    domain =
+      repeat(
         choice([
-        string("/"), string("https://"), string("http://"), string("data:image/")
+          ascii_char([?a..?z]) |> string(".") |> ascii_char([?a..?z]),
+          ascii_char([?a..?z])
+        ])
+      )
+
+    scheme_and_domain =
+      choice([
+        string("/"),
+        string("data:image/"),
+        string("https://") |> concat(domain),
+        string("http://") |> concat(domain)
       ])
 
-    protocol
+    scheme_and_domain
-    |> repeat(lookahead_not(ending_sequence) |> utf8_char([]))
+    |> repeat(utf8_char([]) |> lookahead_not(ending_sequence))
     |> reduce({List, :to_string, []})
   end
 end