Feature or enhancement

Proposal:

From textwrap.dedent() documentation (https://docs.python.org/3/library/textwrap.html):

Remove any common leading whitespace from every line in text.
Note that tabs and spaces are both treated as whitespace,

Sometimes, I want to use textwrap.dedent(), but at the same time, I want it to not cut-off some "wanted" whitespace.

For example, in some places of my project, I want to form a multiline string, where each string is starting with a "\t". Like this:

Attempting to use like this:

logger_module.warning(textwrap.dedent(f"""\\tr[b[*] Unable to move{old_source_dir}\tr[b[*] to{fullpath}\tr[b[*] Error:{e}\ty[b[*] Will proceed, generating a new source dir."""))

Unfortunately (and expectedly), it removes all leading whitespaceswith the starting tabulation symbols.

In my specific project (kde-builder), as a workaround, I could use "]" in the beginning of lines (in the project, the "]" in string is treated as escape sequence for unsetting colored output).
This way, as textwrap.dedent considers "]" as non-whitespace, it preserves the following "\t".

My workaround:

logger_module.warning(textwrap.dedent(f"""\                    ]\tr[b[*] Unable to move{old_source_dir}                    ]\tr[b[*] to{fullpath}                    ]\tr[b[*] Error:{e}                    ]\ty[b[*] Will proceed, generating a new source dir."""))

But I would like to be able to not use crutches, and instead use universal solution. For example, a dedent() method could have a parameter to preserve specific substring in the beginning:
like this:preserve_substring="\t", and so

logger_module.warning(textwrap.dedent(f"""\\tr[b[*] Unable to move{old_source_dir}\tr[b[*] to{fullpath}\tr[b[*] Error:{e}\ty[b[*] Will proceed, generating a new source dir.""",preserve_substring="\t"))

could work as I expect.

Can this be added please?

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response