userdiff: recognize 'macro_rules!' as starting a Rust function block

Signed-off-by: Konrad Borowski <konrad@borowski.pw>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/t/t4018/rust-macro-rules b/t/t4018/rust-macro-rules
new file mode 100644
index 0000000000..ec610c5b62
--- /dev/null
+++ b/t/t4018/rust-macro-rules
@@ -0,0 +1,6 @@
+macro_rules! RIGHT {
+    () => {
+        // a comment
+        let x = ChangeMe;
+    };
+}