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-rw-r--r--src/tools/rustfmt/tests/source/cfg_if/mod.rs5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/source/cfg_if/mod.rs b/src/tools/rustfmt/tests/source/cfg_if/mod.rs
new file mode 100644
index 000000000..b630e7ff3
--- /dev/null
+++ b/src/tools/rustfmt/tests/source/cfg_if/mod.rs
@@ -0,0 +1,5 @@
+//! `std_detect`
+
+#[doc(hidden)] // unstable implementation detail
+#[unstable(feature = "stdsimd", issue = "27731")]
+pub mod detect;