Clippy fixes

Author: weiznich

diesel/src/doctest_setup.rs

@@ -1,10 +1,7 @@
-extern crate dotenv;
-#[macro_use] extern crate cfg_if;
-
 use diesel::prelude::*;
-use self::dotenv::dotenv;
+use dotenv::dotenv;
 
-cfg_if! {
+cfg_if::cfg_if! {
     if #[cfg(feature = "postgres")] {
         #[allow(dead_code)]
         type DB = diesel::pg::Pg;
@@ -104,7 +101,7 @@ cfg_if! {
                 (1, 'My first post'),
                 (1, 'About Rust'),
                 (2, 'My first post too')").unwrap();
-            
+
             connection.execute("CREATE TABLE comments (
                 id INTEGER PRIMARY KEY AUTOINCREMENT,
                 post_id INTEGER NOT NULL,
@@ -161,7 +158,7 @@ cfg_if! {
                 (1, 'My first post'),
                 (1, 'About Rust'),
                 (2, 'My first post too')").unwrap();
-            
+
             connection.execute("CREATE TABLE comments (
                 id INTEGER PRIMARY KEY AUTO_INCREMENT,
                 post_id INTEGER NOT NULL,
@@ -195,7 +192,6 @@ fn database_url_from_env(backend_specific_env_var: &str) -> String {
         .expect("DATABASE_URL must be set in order to run tests")
 }
 
-
 mod schema {
     use diesel::prelude::*;
 

diesel_migrations/migrations_macros/src/lib.rs

@@ -5,7 +5,8 @@
     clippy::option_map_unwrap_or_else,
     clippy::option_map_unwrap_or,
     clippy::match_same_arms,
-    clippy::type_complexity
+    clippy::type_complexity,
+    clippy::needless_doctest_main
 )]
 #![warn(
     clippy::option_unwrap_used,