Replace block of reindexing commands with more REINDEX CONCURRENTLY

[Andrey3096]

@keithf4, hi!

I have noticed that the output of --rebuild_index flag is a block of commands recreating the index. Since pg v.12 there is an option that enables reindexing concurrently.

Would you consider replacing the block of commands with the more intuitive and clear REINDEX CONCURRENTLY? That is rather about preferences, not the issue, but i hope that measure is beneficial for understanding.

Hope for your response.

[keithf4]

Sure I can see about adding that. Thank you!

[Andrey3096]

Thank you