Add a test for #2123 and update tests

tests/target/enum.rs

@@ -58,7 +58,7 @@ enum X {
 }
 
 pub enum EnumWithAttributes {
-    // This is a pre comment
+    //This is a pre comment
     // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
     TupleVar(usize, usize, usize), /* AAAA AAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA
                                     * AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA */

tests/target/issue-2123.rs

@@ -0,0 +1,6 @@
+// rustfmt-wrap_comments: true
+
+//hello
+//world
+
+fn main() {}

tests/target/structs.rs

@@ -271,7 +271,7 @@ struct Foo {
     aaaaaaa: u32, /* multi
                    * line
                    * comment
-                   * */
+                   */
     b: u32, // hi
 
     do_not_push_this_comment1: u32, // comment1

tests/target/unions.rs

@@ -176,7 +176,7 @@ union Foo {
     aaaaaaa: u32, /* multi
                    * line
                    * comment
-                   * */
+                   */
     b: u32, // hi
 
     do_not_push_this_comment1: u32, // comment1