gio: Fix some more new clippy warnings

error: the borrowed expression implements the required traits
   --> gio/src/list_store.rs:164:21
    |
164 |         list.extend(&[&item0, &item1]);
    |                     ^^^^^^^^^^^^^^^^^ help: change this to: `[&item0, &item1]`
    |
    = note: `-D clippy::needless-borrow` implied by `-D warnings`
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow

error: the borrowed expression implements the required traits
   --> gio/src/settings.rs:183:23
    |
183 |                   .args(&[
    |  _______________________^
184 | |                     &format!("{}/tests", env!("CARGO_MANIFEST_DIR")),
185 | |                     "--targetdir",
186 | |                     env!("OUT_DIR"),
187 | |                 ])
    | |_________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
help: change this to
    |
183 ~                 .args([
184 +                     &format!("{}/tests", env!("CARGO_MANIFEST_DIR")),
185 +                     "--targetdir",
186 +                     env!("OUT_DIR"),
187 ~                 ])
    |

Author: sdroege

gio/src/list_store.rs

@@ -161,10 +161,10 @@ mod tests {
         let item0 = ListStore::new(ListStore::static_type());
         let item1 = ListStore::new(ListStore::static_type());
         let mut list = ListStore::new(ListStore::static_type());
-        list.extend(&[&item0, &item1]);
+        list.extend([&item0, &item1]);
         assert_eq!(list.item(0).as_ref(), Some(item0.upcast_ref()));
         assert_eq!(list.item(1).as_ref(), Some(item1.upcast_ref()));
-        list.extend(&[item0.clone(), item1.clone()]);
+        list.extend([item0.clone(), item1.clone()]);
         assert_eq!(list.item(2).as_ref(), Some(item0.upcast_ref()));
         assert_eq!(list.item(3).as_ref(), Some(item1.upcast_ref()));
 

gio/src/settings.rs

@@ -180,7 +180,7 @@ mod test {
     fn set_env() {
         INIT.call_once(|| {
             let output = Command::new("glib-compile-schemas")
-                .args(&[
+                .args([
                     &format!("{}/tests", env!("CARGO_MANIFEST_DIR")),
                     "--targetdir",
                     env!("OUT_DIR"),