Auto merge of #3829 - mikerite:fix-double-parens-suggestions, r=flip1995

Add `rustfmt::skip` to `double_parens` tests

ci/base-tests.sh

@@ -59,7 +59,7 @@ rustup override set nightly
 # avoid loop spam and allow cmds with exit status != 0
 set +ex
 
-for file in `find tests -not -path "tests/ui/double_parens.rs" -not -path "tests/ui/doc.rs" -not -path "tests/ui/unused_unit.rs" | grep "\.rs$"` ; do
+for file in `find tests -not -path "tests/ui/doc.rs" -not -path "tests/ui/unused_unit.rs" | grep "\.rs$"` ; do
   rustfmt ${file} --check
   if [ $? -ne 0 ]; then
     echo "${file} needs reformatting!"

tests/ui/double_parens.rs

@@ -1,5 +1,8 @@
 #![warn(clippy::double_parens)]
 #![allow(dead_code)]
+#![feature(custom_inner_attributes)]
+#![rustfmt::skip]
+
 fn dummy_fn<T>(_: T) {}
 
 struct DummyStruct;

tests/ui/double_parens.stderr

@@ -1,5 +1,5 @@
 error: Consider removing unnecessary double parentheses
-  --> $DIR/double_parens.rs:12:5
+  --> $DIR/double_parens.rs:15:5
    |
 LL |     ((0))
    |     ^^^^^
@@ -7,31 +7,31 @@ LL |     ((0))
    = note: `-D clippy::double-parens` implied by `-D warnings`
 
 error: Consider removing unnecessary double parentheses
-  --> $DIR/double_parens.rs:16:14
+  --> $DIR/double_parens.rs:19:14
    |
 LL |     dummy_fn((0));
    |              ^^^
 
 error: Consider removing unnecessary double parentheses
-  --> $DIR/double_parens.rs:20:20
+  --> $DIR/double_parens.rs:23:20
    |
 LL |     x.dummy_method((0));
    |                    ^^^
 
 error: Consider removing unnecessary double parentheses
-  --> $DIR/double_parens.rs:24:5
+  --> $DIR/double_parens.rs:27:5
    |
 LL |     ((1, 2))
    |     ^^^^^^^^
 
 error: Consider removing unnecessary double parentheses
-  --> $DIR/double_parens.rs:28:5
+  --> $DIR/double_parens.rs:31:5
    |
 LL |     (())
    |     ^^^^
 
 error: Consider removing unnecessary double parentheses
-  --> $DIR/double_parens.rs:50:16
+  --> $DIR/double_parens.rs:53:16
    |
 LL |     assert_eq!(((1, 2)), (1, 2), "Error");
    |                ^^^^^^^^