configuration file. Note that this also affects options like '--replace-all'
and '--unset'. *'git config' will only ever change one file at a time*.
-You can override these rules either by command line options or by environment
+You can override these rules either by command-line options or by environment
variables. The '--global' and the '--system' options will limit the file used
to the global or system-wide file respectively. The GIT_CONFIG environment
variable has a similar effect, but you can specify any filename you want.