Add some nom macro examples
diff --git a/src/lib.rs b/src/lib.rs
index 38ebc90..c4a77f6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -156,7 +156,7 @@
                     // parsed nothing
                     Err(format!("failed to parse {}: {:?}", name, rest))
                 } else {
-                    Err(format!("failed to parse tokens after {}: {:?}", name, rest))
+                    Err(format!("unparsed tokens after {}: {:?}", name, rest))
                 }
             }
             IResult::Error => Err(format!("failed to parse {}: {:?}", name, input)),