diff::parse: don't include `diff.h` We don't call any internal functions in the test; we don't need to include `../src/diff.h`.
diff --git a/tests/diff/parse.c b/tests/diff/parse.c
index b004d1e..7cc5433 100644
--- a/tests/diff/parse.c
+++ b/tests/diff/parse.c
@@ -2,7 +2,6 @@
#include "patch.h"
#include "patch_parse.h"
#include "diff_helpers.h"
-#include "../src/diff.h"
#include "../patch/patch_common.h"