Fix tidy

Author: estebank

tests/ui/parser/recover/recover-parens-around-match-arm-head.fixed

@@ -0,0 +1,12 @@
+// run-rustfix
+fn main() {
+    let val = 42;
+    let x = match val {
+        0 if true => {
+        //~^ ERROR unexpected parentheses surrounding `match` arm pattern
+            42u8
+        }
+        _ => 0u8,
+    };
+    let _y: u32 = x.into(); //~ ERROR mismatched types
+}

tests/ui/parser/recover/recover-parens-around-match-arm-head.rs

@@ -1,3 +1,4 @@
+// run-rustfix
 fn main() {
     let val = 42;
     let x = match val {

tests/ui/parser/recover/recover-parens-around-match-arm-head.stderr

@@ -1,5 +1,5 @@
 error: unexpected parentheses surrounding `match` arm pattern
-  --> $DIR/recover-parens-around-match-arm-head.rs:4:9
+  --> $DIR/recover-parens-around-match-arm-head.rs:5:9
    |
 LL |         (0 if true) => {
    |         ^         ^
@@ -11,7 +11,7 @@ LL +         0 if true => {
    |
 
 error[E0308]: mismatched types
-  --> $DIR/recover-parens-around-match-arm-head.rs:10:19
+  --> $DIR/recover-parens-around-match-arm-head.rs:11:19
    |
 LL |     let _y: u32 = x;
    |             ---   ^ expected `u32`, found `u8`