make the pre check sample not fail the samples run

Author: PragTob

samples/pre_check.exs

@@ -12,8 +12,9 @@ Benchee.run(%{"a*2" => fn -> a * 2 end, "a+a" => fn -> a + a end},
   pre_check: :all_same
 )
 
-Benchee.run(%{"a*2" => fn -> a * 2 end, "a+a" => fn -> a + a + 1 end},
-  time: 0,
-  warmup: 0,
-  pre_check: :all_same
-)
+# this one is expected to fail, commented out by default so that `run_samples.sh` doesn't quit here
+# Benchee.run(%{"a*2" => fn -> a * 2 end, "a+a (wrong)" => fn -> a + a + 1 end},
+#   time: 0,
+#   warmup: 0,
+#   pre_check: :all_same
+# )