brew_cleanup: Clean up Homebrew environment
In briandconnelly/homebrew: Install and Manage Packages using 'Homebrew'

brew_cleanup() removes stale lock files and outdated downloads for all formulae and casks, and removes old versions of installed formulae.

1	brew_cleanup(...)

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Arguments passed on to brew_cmd

cmd: The command to run (e.g., install)
args: Additional arguments for the command
brew_cmd: Optional: Location of brew command.
echo: Whether to print output and error messages to the screen. Defaults to TRUE for interactive sessions.