improve contribution to add examples, fix some clippy warns

examples/src/ln_dom.rs

@@ -1,9 +1,7 @@
 // related to issue https://github.com/media-io/yaserde/issues/11
-use std::io::Read;
-use yaserde::YaDeserialize;
 
 #[derive(YaDeserialize, Default, Debug, PartialEq)]
-#[yaserde(root="DOMSymbolItem")]
+#[yaserde(root = "DOMSymbolItem")]
 struct Level {
   #[yaserde(attribute)]
   last_modified: u64,
@@ -15,7 +13,7 @@ struct Level {
 #[derive(YaDeserialize, Default, Debug, PartialEq)]
 struct Timeline {
   #[yaserde(rename = "DOMTimeline")]
-  timeline: DOMTimeline
+  timeline: DOMTimeline,
 }
 
 #[derive(YaDeserialize, Default, Debug, PartialEq)]
@@ -26,13 +24,13 @@ struct DOMTimeline {
   current_frame: u64,
   #[yaserde(attribute)]
   guides: u64,
-  layers: Layers
+  layers: Layers,
 }
 
 #[derive(YaDeserialize, Default, Debug, PartialEq)]
 struct Layers {
   #[yaserde(rename = "DOMLayer")]
-  dom_layer: Vec<DOMLayer>
+  dom_layer: Vec<DOMLayer>,
 }
 
 #[derive(YaDeserialize, Default, Debug, PartialEq)]
@@ -40,22 +38,19 @@ struct DOMLayer {
   #[yaserde(attribute, rename = "name")]
   named: String,
   #[yaserde(attribute)]
-  name2: String
+  name2: String,
 }
 
 #[test]
 fn parsing_ln_dom() {
-  use std::fs::File;
+  use std::fs;
   use yaserde::de::from_str;
 
   let filename = "tests/data/ln-dom.xml";
-  let mut f = File::open(filename).expect("file not found");
 
-  let mut contents = String::new();
-  f.read_to_string(&mut contents)
-    .expect("something went wrong reading the file");
+  let content = fs::read_to_string(filename).expect("something went wrong reading the file");
 
-  let loaded: Level = from_str(&contents).unwrap();
+  let loaded: Level = from_str(&content).unwrap();
   println!("{:?}", loaded);
 
   let reference = Level {
@@ -70,16 +65,16 @@ fn parsing_ln_dom() {
           dom_layer: vec![
             DOMLayer {
               named: "Layer 2".to_string(),
-              name2: "Lalayer 2".to_string()
+              name2: "Lalayer 2".to_string(),
             },
             DOMLayer {
               named: "Layer 1".to_string(),
-              name2: "Lalayer 1".to_string()
-            }
-          ]
-        }
-      }
-    }
+              name2: "Lalayer 1".to_string(),
+            },
+          ],
+        },
+      },
+    },
   };
 
   assert_eq!(loaded, reference);