bpo-32150: Expand tabs to spaces in C files. (#4583)

diff --git a/Doc/includes/shoddy.c b/Doc/includes/shoddy.c
index 0c6d412..0ef4765 100644
--- a/Doc/includes/shoddy.c
+++ b/Doc/includes/shoddy.c
@@ -17,7 +17,7 @@
 static PyMethodDef Shoddy_methods[] = {
     {"increment", (PyCFunction)Shoddy_increment, METH_NOARGS,
      PyDoc_STR("increment state counter")},
-    {NULL,	NULL},
+    {NULL},
 };
 
 static int