consistent results / output from brew style

[ipatch]

Output of brew config

na

Output of brew doctor

na

Description of issue

in the middle of updating a formula for the homebrew-freecad repo / tap. generally i run the below command before submitting my PR for the formula in question.

brew style freecad/freecad

and i get no output (meaning my repo / tap has no style errors)

however when test-bot goes through its build/rebuild process of updating the formula it runs the below command,

brew style --formula freecad/freecad/fc_bundle

and oddly enough shows no output in the github ci output,

https://github.com/FreeCAD/homebrew-freecad/actions/runs/9389547365/job/25857266588?pr=519#step:18:96

however running the same command locally yields the below output,

Formula/fc_bundle.rb:39:5: W: [Correctable] Lint/UselessAssignment: Useless assignment to variable - venv_python.
    venv_python = venv_dir/"bin/python"
    ^^^^^^^^^^^

1 file inspected, 1 offense detected, 1 offense autocorrectable

wouldn't it make sense when running brew style [org/tap] to produce the same results as the below command?

brew style --formula freecad/freecad/fc_bundle