README: add trailing commas and rid of some whitespace (for consistency)

Author: tshepang

README.md

@@ -22,13 +22,11 @@ use postgres::{Connection, SslMode};
 struct Person {
     id: i32,
     name: String,
-    data: Option<Vec<u8>>
+    data: Option<Vec<u8>>,
 }
 
 fn main() {
-    let conn = Connection::connect("postgres://postgres@localhost", SslMode::None)
-            .unwrap();
-
+    let conn = Connection::connect("postgres://postgres@localhost", SslMode::None).unwrap();
     conn.execute("CREATE TABLE person (
                     id              SERIAL PRIMARY KEY,
                     name            VARCHAR NOT NULL,
@@ -37,16 +35,15 @@ fn main() {
     let me = Person {
         id: 0,
         name: "Steven".to_string(),
-        data: None
+        data: None,
     };
     conn.execute("INSERT INTO person (name, data) VALUES ($1, $2)",
                  &[&me.name, &me.data]).unwrap();
-
     for row in &conn.query("SELECT id, name, data FROM person", &[]).unwrap() {
         let person = Person {
             id: row.get(0),
             name: row.get(1),
-            data: row.get(2)
+            data: row.get(2),
         };
         println!("Found person {}", person.name);
     }