Merged two concats into one

[daviddavo]

Description

Just replaced with a oneliner to make just one concat instead of two

Related Issues

• Add support for Python 3.10 and 3.11 #1937 (comment)

References

[...] If function is None, the identity function is assumed, that is, all elements of iterable that are false are removed.
-- https://docs.python.org/3.9/library/functions.html#filter

Checklist:

• I have followed the contribution guidelines and code style for this project.
• I have added tests covering my contributions. (not needed)
• I have updated the documentation accordingly. (not needed)
• I have signed the commits, e.g. git commit -s -m "your commit message".
• This PR is being made to staging branch AND NOT TO main branch.

[loomlike]

Thank you for making the code clearer and simpler.
I have an alternative suggestion, please check.

[miguelgfierro]

Thanks for this @daviddavo! Super nice!