Clarify docstring for symlink.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index ff81585..43af766 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -4641,7 +4641,7 @@
 #ifdef HAVE_SYMLINK
 PyDoc_STRVAR(posix_symlink__doc__,
 "symlink(src, dst)\n\n\
-Create a symbolic link.");
+Create a symbolic link pointing to src named dst.");
 
 static PyObject *
 posix_symlink(PyObject *self, PyObject *args)