better typo for condition #19400

it just fixes typo for if conditions (for better readable)

Thank you for your contribution. While this stylistic change makes sense on its own, it comes at a cost and risk for the project as a whole. The weak motivation for the change does not justify the burden that it places on the project. A burden could be any of the following:

• Time spent on review
• Accidental introduction of bugs
• (Silent) merge conflicts, either in the branch or a backport branch. Those conflicts demand further developer and reviewer time or introduce bugs.

For more information about refactoring changes and stylistic cleanup, see

• https://github.com/bitcoin/bitcoin/blob/master/CONTRIBUTING.md#refactoring
• https://github.com/bitcoin/bitcoin/blob/master/.github/PULL_REQUEST_TEMPLATE.md
• #15465

Generally, if the style is not mentioned nor enforced by the developer notes, we leave it up to the original author to pick whatever fits them best personally and then leave it that way until the line is touched for other reasons.

Let me know if you have any questions.

If you want to help out with more meaningful changes, please refer to the following intro.

Getting started to contribute to Bitcoin Core

Setting up your development environment

New developers are very welcome and needed. There are a lot of open issues of any difficulty waiting to be fixed. However, before you start contributing, familiarize yourself with the Bitcoin Core build system and tests. Refer to the documentation in the repository on how to build Bitcoin Core and how to run the unit and functional tests. Once that is done, you are all set.

If you need more help getting started, please refer to the following resources:

• https://medium.com/@amitiu/onboarding-to-bitcoin-core-7c1a83b20365
• https://jonatack.github.io/articles/how-to-review-pull-requests-in-bitcoin-core

Pick something to work on

If you are looking for useful contributions to help out with, you can

• Search through the good first issues or the ones that are up for grabs. Some of them might no longer be applicable. So if you are interested, but unsure, you might want to leave a comment on the issue first.
• Write tests to improve the coverage. Any kind of test is welcome and coverage information can be obtained from a relatively recent coverage report. If you are unsure, don't hesitate to check back first.
• Help with review and testing. There are easy ones such as the gui and rpc. However, review on any open pull request is welcome. Review will also help you understand the codebase better.
• Help on meta projects related to Bitcoin Core, such as a high-level performance monitor.
• Join us on irc and let us know what you are interested in.