B028 gives wrong suggestion if variable is not a string

[xqt]

B028 gives wrong suggestion if variable is not a string, for example let's have

>>> x = 5
>>> print(f'"{x}"')
"5"

but the representation does not include quotes:

>>> print(f'{x!r}')
5

You have to change the type first like:

>>> print(f'{str(x)!r}')
'5'

but is this an improvement? And the B028 does not suggest this.

See also inducer/pytools#171

[John Litborn]

Hm, yeah this is probably not an acceptable level of false-positives for a default-on check - thought I'd checked for this in the test but I very much did not. The only way to get around this is to do type analysis on the variable - which becomes quite expensive/complicated for a pretty niche check. @Zac-HD

[Zac Hatfield-Dodds]

Per #331 (comment), let's disable it by default.