Remove useless `{...!s}`

[DimitriPapadopoulos]

Remove useless !s in f"...{...!s}...".

[d-v-b]

how do you know they are useless?

[DimitriPapadopoulos]

Isn't str() the default conversion?

[d-v-b]

I don't actually know, but I do know that officially !s is redundant: https://peps.python.org/pep-0498/#s-r-and-a-are-redundant, so if we do want to be sure we are calling str() in the fstring we should directly call str.

But I'd like to know why those !s were added before we remove them

[DimitriPapadopoulos]

From PEP 3101:

Explicit Conversion Flag

The explicit conversion flag is used to transform the format field value before it is formatted. This can be used to override the type-specific formatting behavior, and format the value as if it were a more generic type.

In the absence of an explicit conversion flag, the value is simply formatted. The default formatting converts to a str:

Controlling Formatting on a Per-Type Basis

[...] The object.__format__ method is the simplest: It simply converts the object to a string, and then calls format again:

class object:
    def __format__(self, format_spec):
        return format(str(self), format_spec)

I don't think !s was added for a reason here.