Add a test for rust-lang#2941.

xiongmao86 · xiongmao86 · commit 174f5911349d · 2019-04-26T16:04:49.000+08:00
diff --git a/tests/target/issue-2941.rs b/tests/target/issue-2941.rs
@@ -0,0 +1,5 @@
+// rustfmt-wrap_comments: true
+
+//! ```
+//! \
+//! ```

-Original file line number
+Diff line change
 +// rustfmt-wrap_comments: true
++
 +//! ```
 +//! \
 +//! ```