help: drop prepend function in favor of xstrfmt

diff --git a/builtin/checkout.c b/builtin/checkout.c
index 52d59eba80048f507267002a6a88135ca46376b8..bc703c0f5ed9644b2380ed1f2e20b47238c80e5a 100644 (file)
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -18,6 +18,7 @@
 #include "xdiff-interface.h"
 #include "ll-merge.h"
 #include "resolve-undo.h"
+#include "submodule-config.h"
 #include "submodule.h"
 
 static const char * const checkout_usage[] = {