With #900, buildtools gained the ability to parse type annotations on parameters and return types, but it didn't add inline type annotations.

def _collect_nix_deps(ctx: bxl.Context):
    target = ctx.cli_args.target
    # TODO: is this platform name required?
    cquery: bxl.CqueryContext = ctx.cquery("prelude//platforms:default")

The above is accepted by buck2 in a BXL context at least (and I would assume also other contexts) and is rejected by buildifier -type default:

snowydeer/snowydeer.bxl:46:12: syntax error near :
snowydeer/snowydeer.bxl # reformat

cc @ndmitchell as original issue author