[PATCH] fix global bash variable on __gitcompappend

Hi,

This is how to reproduce the bug:

``` git checkout [tab-tab] echo $x # outputs the name of the last branch on completion list ```

Or more directly:

``` __gitcompappend "something" echo $x # outputs 'something' ```

Might not be a big deal, but it's annoying to know that `$x` is lurking.

Márcio Almada (1):
  fix global bash variable leak on __gitcompappend

 contrib/completion/git-completion.bash | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)