Improved robustness of the update_gem function

[gvatsal60]

Improved robustness of the update_gem function.

• Added error handling for gem command not found and update/cleanup failures.
• Enhanced messages to provide clearer feedback to the user.
• Introduced consistent return codes to signal errors in the script.

[gvatsal60]

Hi @andmpel

Please review it!

[andmpel]

check gem command is unnecessary as gem is built into macOS, therefore it will always be there.

[gvatsal60]

check gem command is unnecessary as gem is built into macOS, therefore it will always be there.

I agree, but it's possible that in the future, macOS might decide to remove gem. Therefore, to be better prepared and maintain consistency, it’s best to let it remain..

[andmpel]

I find it extremely unlikely that Apple would remove ruby/gem from their Unix based OS. I favor keeping the script smaller than adding redundant/unnecessary checks.

[gvatsal60]

I find it extremely unlikely that Apple would remove ruby/gem from their Unix based OS. I favor keeping the script smaller than adding redundant/unnecessary checks.

After thorough consideration, I agree with the comment. Closing this pull request.