What means "git config bla ~/"?

[rpjday]

  i'm sure i'm about to embarrass myself but, in "man git-config",  
OPTIONS, one reads:

  --path
  git-config will expand leading ~ to the value of $HOME, and ~user  
to the   home directory for the specified user. This option has no  
effect when setting the value (but you can use git config bla ~/ from  
the command line to let your shell do the expansion).

  what's with that "git config bla ~/"? is this some config keyword  
or something?

rday