asim: fix up a comment

For easier copy paste.

Author: tbg

pkg/kv/kvserver/asim/tests/datadriven_simulation_test.go

@@ -169,8 +169,9 @@ var runAsimTests = envutil.EnvOrDefaultBool("COCKROACH_RUN_ASIM_TESTS", false)
 //
 // To run all tests and rewrite the testdata files as well as generate the
 // artifacts in `testdata/generated`, you can use:
-// ./dev test pkg/kv/kvserver/asim/tests --ignore-cache --rewrite -v -f TestDataDriven -- --test_env COCKROACH_RUN_ASIM_TESTS=true --test_env
-// COCKROACH_ALWAYS_KEEP_TEST_LOGS=true */
+/*
+./dev test pkg/kv/kvserver/asim/tests --ignore-cache --rewrite -v -f TestDataDriven -- --test_env COCKROACH_RUN_ASIM_TESTS=true --test_env COCKROACH_ALWAYS_KEEP_TEST_LOGS=true
+*/
 func TestDataDriven(t *testing.T) {
 	skip.UnderDuressWithIssue(t, 149875)
 	leakTestAfter := leaktest.AfterTest(t)