Switch to the new code style

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/include/alt-dummy/chacha20_alt.h b/tests/include/alt-dummy/chacha20_alt.h
index 7a5a25c..a53a330 100644
--- a/tests/include/alt-dummy/chacha20_alt.h
+++ b/tests/include/alt-dummy/chacha20_alt.h
@@ -19,8 +19,7 @@
 #ifndef CHACHA20_ALT_H
 #define CHACHA20_ALT_H
 
-typedef struct mbedtls_chacha20_context
-{
+typedef struct mbedtls_chacha20_context {
     int dummy;
 }
 mbedtls_chacha20_context;