Level 3 . Strange error  Go to the Training: Regex challenge

This is my regex:

[CENSORED]

It keeps telling me that the pattern identifies "wechall4.jpf" but it shouldn't....
I've tested my pattern in an online tool site (regexr.com) and it works...so why it keeps telling me that?

I tried your regex on the site you mentioned and it indeed matched wechall4.jpf. No sure what you would do different to not get it to match.

You are making a mistake in your syntax, making the final part match only one character...

I also tried this pattern

[CENSORED]

and it tells that "my pattern captures a string and this is unnecessary. Use a non capturing group".
I then changed it into this:

[CENSORED]

and it says again that it captures wechall.jpf and it shouldn't

Yeah, you're right. I was wrong because in that site the first pattern I wrote (and the third too)..match wechall.jpf...but the second I posted, the one with rounded parenthesys, doesn't match it. It works perfectly in the site

Yes, you seem to misunderstand the function of the characters in the first and third example. Try looking it up. (Or looking it up in another place?)

The second one indeed works, but does more than requested, which is why you get the error you get.

I'd prefer it if you don't post spoilers at all. You can always talk in private (PM or IRC) if you want to go into details.