Fix GFM autolink literals that end in in GFM table pipes

Closes GH-20.

Co-authored-by: Christian Murphy <christian.murphy.42@gmail.com>

src/construct/gfm_autolink_literal.rs

@@ -470,8 +470,9 @@ pub fn path_inside(tokenizer: &mut Tokenizer) -> State {
         }
         _ => {
             // Source: <https://github.com/github/cmark-gfm/blob/ef1cfcb/extensions/autolink.c#L12>.
-            if kind_after_index(tokenizer.parse_state.bytes, tokenizer.point.index)
-                == CharacterKind::Whitespace
+            if tokenizer.current.is_none()
+                || kind_after_index(tokenizer.parse_state.bytes, tokenizer.point.index)
+                    == CharacterKind::Whitespace
             {
                 State::Retry(StateName::GfmAutolinkLiteralPathAfter)
             } else {

tests/fuzz.rs

@@ -98,5 +98,11 @@ fn fuzz() -> Result<(), String> {
         "8-d: autolink literals after tabs (GH-18)"
     );
 
+    assert_eq!(
+        to_html_with_options("| a |\n| - |\n| www.a|", &Options::gfm()),
+        Ok("<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td><a href=\"http://www.a\">www.a</a></td>\n</tr>\n</tbody>\n</table>".into()),
+        "9: autolink literals that end in table cell delimiter (GH-20)"
+    );
+
     Ok(())
 }