improve tests

Author: ia0

tests/source/try_block.rs

@@ -1,4 +1,5 @@
 // rustfmt-edition: 2018
+#![feature(try_blocks)]
 
 fn main() -> Result<(), !> {
     let _x: Option<_> = try {

tests/source/try_blocks_heterogeneous.rs

@@ -1,4 +1,5 @@
 // rustfmt-edition: 2018
+#![feature(try_blocks_heterogeneous)]
 
 fn main() -> Result<(), !> {
     let _x = try bikeshed Option<_> {
@@ -24,6 +25,10 @@ fn baz() -> Option<i32> {
         6
     }; // comment
 
+    let x = try /* Invisible comment */ bikeshed Option<()> {};
+    let x = try bikeshed /* Invisible comment */ Option<()> {};
+    let x = try bikeshed Option<()> /* Invisible comment */ {};
+
     let x = try bikeshed Option<i32> { baz()?; baz()?; baz()?; 7 };
 
     let x = try bikeshed Foo<Bar, Bar, Bar, Bar, Bar, Bar, Bar, Bar, Bar, Bar, Bar, Bar, Bar> { 1 + 1 + 1 };

tests/target/try_block.rs

@@ -1,4 +1,5 @@
 // rustfmt-edition: 2018
+#![feature(try_blocks)]
 
 fn main() -> Result<(), !> {
     let _x: Option<_> = try { 4 };

tests/target/try_blocks_heterogeneous.rs

@@ -1,4 +1,5 @@
 // rustfmt-edition: 2018
+#![feature(try_blocks_heterogeneous)]
 
 fn main() -> Result<(), !> {
     let _x = try bikeshed Option<_> { 4 };
@@ -18,6 +19,10 @@ fn baz() -> Option<i32> {
 
     let y = try bikeshed Option<i32> { 6 }; // comment
 
+    let x = try /* Invisible comment */ bikeshed Option<()> {};
+    let x = try bikeshed /* Invisible comment */ Option<()> {};
+    let x = try bikeshed Option<()> /* Invisible comment */ {};
+
     let x = try bikeshed Option<i32> {
         baz()?;
         baz()?;