man page for "git config" re: GIT_CONFIG and "-f" seems weird/wrong

  (apologies to those whose email systems barfed on my domain being
badly configured WRT MX record, i have been assured by my admin it's
been fixed.)

  reading "man git-config", first, it seems awkward that the "-f"
option is explained in terms of GIT_CONFIG even when that variable
hasn't been introduced yet:

  -f config-file, --file config-file
     Use the given config file instead of the one specified by GIT_CONFIG.

the way that's worded makes it seem like GIT_CONFIG *must* have a value somewhere that is being overridden. perhaps a more general explanation would be something like, "Explicitly use this, and *only* this config file, regardless of other possible config settings."

  it might also be worth mentioning that, once you specify this
option, also using any of --local, --global or --system will result in
an error:

  $ git config -l -f ~/gitc --global
  error: only one config file at a time.
  ... snip ...

  related to this, under "ENVIRONMENT", the explanation for GIT_CONFIG
seems somewhat draconian:

  GIT_CONFIG
    Take the configuration from the given file instead of .git/config.
    Using the "--global" option forces this to  ~/.gitconfig. Using
    the "--system" option forces this to $(prefix)/etc/gitconfig.

the word "forces" seems a bit heavy-handed, and the explanation is misleading, anyway ... if you've already set GIT_CONFIG, then using any other option of --local, --global or --system produces the same error as before:

  $ git config -l --system
  error: only one config file at a time.
  $

in other words, if GIT_CONFIG is already set, using --global or --system doesn't "force" anything, it's simply an error, no?

rday