(Ftrace_to_stderr): Add usage to docstring.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index d391a37f22..896740367f 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -12471,7 +12471,8 @@ With ARG, turn tracing on if and only if ARG is positive.  */)
 
 
 DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, MANY, "",
-       doc: /* Like `format', but print result to stderr.  */)
+       doc: /* Like `format', but print result to stderr.
+usage: (trace-to-stderr STRING &rest OBJECTS)  */)
      (nargs, args)
      int nargs;
      Lisp_Object *args;