Clarifies an error message in Katas to explain what is actually wrong.

[tvalentyn]

Spent some time figuring out why I am getting "Incorrect" mark for a correct submission that matches the solution. After debugging the internals it turned out that my answer was written outside of the answer prompts. New message should explain the user what is wrong.

Post-Commit Tests Status (on master branch)

Lang	SDK	Apex	Dataflow	Flink	Gearpump	Samza	Spark
Go		---	---		---	---
Java
Python		---			---	---
XLang	---	---	---		---	---

Pre-Commit Tests Status (on master branch)

---	Java	Python	Go	Website
Non-portable
Portable	---		---	---

See .test-infra/jenkins/README for trigger phrase, status and link of all Jenkins jobs.

[tvalentyn]

@henryken @pabloem @aaltay - do you know how frequently this course is uploaded to https://stepik.org/? Does this happen for every release?

[henryken]

@tvalentyn, we update the course when there are changes.
Thanks for this input btw. I already have a plan to remove this answer placeholder check since few people also encounter the same misunderstanding.

[tvalentyn]

Np! should we merge or close this PR?

[pabloem]

Run Website_Stage_GCS PreCommit

[pabloem]

I'm running the website staging to produce an archived version of the current website. Please disregard that : ) - I just looked for a recent PR.

[pabloem]

@henryken WDYT? It might make sense to merge this at least until you actually remove the check?

[aaltay]

Merging sounds good. What is https://stepik.org/ ?

[aaltay]

retest this please

[pabloem]

stepik is the platform where these courses are uploaded , an downloaded by intellij

[aaltay]

stepik is the platform where these courses are uploaded , an downloaded by intellij

Thank you! :)

[henryken]

Btw, I've submitted a pull request to remove all the placeholder checks
#11730