Enable merge_imports rustfmt setting.

style: Enable rustfmt merge_imports and format

This commit enables the rustfmt merge_imports setting
and formats the whole code base accordingly.

Note that the setting is not stable yet, but will be with Rust 1.38.

In the meantime, running fmt on stable will just leave the
changes alone so no problems should occur.

juniper/src/lib.rs

@@ -180,7 +180,7 @@ pub use crate::{
 pub type BoxFuture<'a, T> = std::pin::Pin<Box<dyn std::future::Future<Output = T> + 'a + Send>>;
 
 #[cfg(feature = "async")]
-pub use crate::types::async_await::{GraphQLTypeAsync};
+pub use crate::types::async_await::GraphQLTypeAsync;
 
 /// An error that prevented query execution
 #[derive(Debug, PartialEq)]

juniper/src/types/async_await.rs

@@ -1,9 +1,12 @@
+use crate::{
+    ast::{Directive, FromInputValue, InputValue, Selection},
+    value::{Object, ScalarRefValue, ScalarValue, Value},
+};
 
-use crate::ast::{Directive, FromInputValue, InputValue, Selection};
-use crate::value::{Object, ScalarRefValue, ScalarValue, Value};
-
-use crate::executor::{ExecutionResult, Executor};
-use crate::parser::Spanning;
+use crate::{
+    executor::{ExecutionResult, Executor},
+    parser::Spanning,
+};
 
 use crate::BoxFuture;
 

juniper_rocket/src/lib.rs

@@ -42,14 +42,14 @@ Check the LICENSE file for details.
 
 use std::{
     error::Error,
-    io::Cursor,
+    io::{Cursor, Read},
 };
 
 use rocket::{
-    data::{FromDataFuture, FromDataSimple},
+    data::{FromDataSimple, Outcome as FromDataOutcome},
     http::{ContentType, RawStr, Status},
     request::{FormItems, FromForm, FromFormValue},
-    response::{content, Responder, Response, ResultFuture},
+    response::{content, Responder, Response},
     Data,
     Outcome::{Failure, Forward, Success},
     Request,