(Fuser_real_login_name): Doc fix.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/editfns.c b/src/editfns.c
index abdb16b1caf..e12e39e82f1 100644
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -493,7 +493,8 @@ that determines the value of this function.")
 DEFUN ("user-real-login-name", Fuser_real_login_name, Suser_real_login_name,
   0, 0, 0,
   "Return the name of the user's real uid, as a string.\n\
-Differs from `user-login-name' when running under `su'.")
+This ignores the environment variables LOGNAME and USER, so it differs from
+`user-login-name' when running under `su'.")
   ()
 {
   return Vuser_real_name;