fix shortcuts rendering

fix #35

src/lib.rs

@@ -382,6 +382,7 @@ where
                     if inside_shortcut {
                         shortcuts.push((current_shortcut.clone(), uri.to_string(), title.to_string()));
                         inside_shortcut = false;
+                        current_shortcut = String::new();
                     }
                     formatter.write_char(']')
                 }
@@ -515,9 +516,9 @@ where
         }?
     }
     if !shortcuts.is_empty() {
-        formatter.write_str("\n\n")?;
+        formatter.write_str("\n")?;
         for shortcut in shortcuts {
-            write!(formatter, "[{}", shortcut.0)?;
+            write!(formatter, "\n[{}", shortcut.0)?;
             close_link(&shortcut.1, &shortcut.2, &mut formatter, LinkType::Shortcut)?
         }
     }

tests/fixtures/common-mark.md

@@ -32,7 +32,7 @@ Ask to <[email protected]>.
 
 [1]: http://www.example.com/reference
 
-## Images
+## [Images]
 
 Images as blocks:
 
@@ -204,4 +204,5 @@ foo
 * | < > # 
 ````
 
-[Links]: http://www.example.com/shortcut
+[Links]: http://www.example.com/shortcut
+[Images]: http://www.example.com/another_shortcut

tests/fixtures/snapshots/stupicat-output

@@ -30,7 +30,7 @@ sea [takimata sanctus](./showcase.md) est Lorem ipsum dolor sit amet.
 
 Ask to <[email protected]>.
 
-## Images
+## [Images]
 
 Images as blocks:
 
@@ -203,4 +203,5 @@ foo
 * | < > # 
 ````
 
-[Links]: http://www.example.com/shortcut
+[Links]: http://www.example.com/shortcut
+[Images]: http://www.example.com/another_shortcut

tests/fmt.rs

@@ -228,6 +228,20 @@ mod inline_elements {
         )
     }
 
+    #[test]
+    fn multiple_shortcut_links() {
+        assert_eq!(
+            fmts("[a](b)\n[c] [d]\n\n[c]: e\n[d]: f"),
+            (
+                "[a](b)\n[c] [d]\n\n[c]: e\n[d]: f".into(),
+                State {
+                    newlines_before_start: 2,
+                    ..Default::default()
+                }
+            )
+        )
+    }
+
     #[test]
     fn various() {
         assert_eq!(