Fix tests

Zibi Braniecki · Zibi Braniecki · commit 7471f7821c0a · 2018-05-21T13:01:00.000-07:00
diff --git a/src/snippet.rs b/src/snippet.rs
@@ -3,6 +3,8 @@
 //! Example:
 //!
 //! ```
+//! use annotate_snippets::snippet::*;
+//!
 //! Snippet {
 //!     title: Some(Annotation {
 //!         label: Some("mismatched types".to_string()),
