setup: document prefix

diff --git a/advice.h b/advice.h
index 9b7a3ad1ca126cb882e87d400820043043061f78..3244ebb5c1caffebaaf8f28ce221533c38ec29b5 100644 (file)
--- a/advice.h
+++ b/advice.h
@@ -8,6 +8,7 @@ extern int advice_status_hints;
 extern int advice_commit_before_merge;
 extern int advice_resolve_conflict;
 extern int advice_implicit_identity;
+extern int advice_detached_head;
 
 int git_default_advice_config(const char *var, const char *value);