Slightly gas saving in avg function

[atarpara]

I remove the unnecessary operation in avg function.

[PaulRBerg]

Hi @atarpara! Thanks for your contribution. Unfortunately, I cannot merge this. In fact, I cannot even review it:

• The code does not compile, it fails with the error "ParserError: Expected ';' but got '}'"
• The linter job does not pass (see CI logs) (make sure to install the Prettier extension for VSCode)
• This PR does not include an explanation for why the proposed change brings about a reduction in gas costs while simultaneously keeping the behavior of the avg function the same across all possible inputs and outputs

[atarpara]

@PaulRBerg I solved the compiler error.

[PaulRBerg]

Hi @atarpara, thanks for that. Would you mind explaining how your gas saving works?

[atarpara]

Reduce the Number of Operation

Old Way: (x >> 1) + (y >> 1) + (x & y & 1) - Need 6 Operation

New Way : (x & y) + ((x^y) >> 1) - Need 4 Operation

More Info About is Here.

[PaulRBerg]

Hello @atarpara, I'm sorry for the delayed response.

I ran a few tests and indeed you are right - your approach is faster than mine.

Happy to accept this PR, but could I kindly ask you to re-apply your changes onto the tip of the staging branch, git push with force to your branch, and then make staging the base of this PR?

Thank you!

[PaulRBerg]

Hi @atarpara, I'm sorry, I accidentally closed your PR.

But I managed to implement your proposal, and credit you as a git author in commit a490c08.

Thanks again for your contribution.