[PATCH] git-prompt.sh: make `option` a local variable

From: Sibo Dong <sibo.dong@outlook.com>

Other variables like `key` and `value` are local to this completion script, so I think the same should be done with `option`.

Signed-off-by: Sibo Dong <sibo.dong@outlook.com>
---
    git-prompt.sh: make option a local variable
    
    This is very trivial, but variables like key and value are local to 
    git-prompt.sh, so I think the same should be done with option. I have 
    GIT_PS1_SHOW_UPSTREAM set to verbose in my ~/.bashrc, so option gets set
    to verbose in my Bash session whenever I change directories to a local
    repository with a remote.

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-775%2Fdongsibo%2Ffix-git-prompt-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-775/dongsibo/fix-git-prompt-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/775

 contrib/completion/git-prompt.sh | 1 +
 1 file changed, 1 insertion(+)