remove unnecessary indents

[yosider]

I removed indents by returning first if the condition is not met.
(modified version of #296)

[sylvchev]

Thanks @yosider
I'm sorry if I was unclear regarding the pre-commit, everything seems fine now, you did well.
Usually, it is not necessary to open a new PR: if you want to make a change, you could just modify the current code branch. No need to worry, the most important is that your modifications are taken into account in the codebase.

[sylvchev]

thanks @yosider !