Minor formatting updates

src/bin/kvs.rs

@@ -51,6 +51,6 @@ fn main() {
         Err(err) => {
             eprintln!("{}", err);
             abort()
-        },
+        }
     }
 }

src/lib.rs

@@ -5,7 +5,7 @@ use std::collections::HashMap;
 #[derive(Debug, Default)]
 /// A key/value store
 pub struct KvStore {
-    store: HashMap<String, String>
+    store: HashMap<String, String>,
 }
 
 impl KvStore {