Auto-generate some documentation

libc/testlib/testrunner.c

@@ -46,7 +46,7 @@ wontreturn void testlib_abort(void) {
  */
 testonly void testlib_runtestcases(testfn_t *start, testfn_t *end,
                                    testfn_t warmup) {
-  /**
+  /*
    * getpid() calls are inserted to help visually see tests in traces
    * which can be performed on Linux, FreeBSD, OpenBSD, and XNU:
    *