Bash completion suggests tags for git branch -D

Hi,

Easiest explained via a repro:

    cd $(mktemp -d)
    git init
    touch README
    git add -A
    git commit -am 'Initial commit'
    git checkout -b branch
    git tag b-is-a-tag

If you then type:

    git branch -D b^

leaving the cursor at the position shown by the caret, then attempt completion via <Tab><Tab> (at least according to my bash setup) two options are shown:

    b-is-a-tag   branch

b-is-a-tag is not a branch, so should not be offered as a completion candidate in this instance.

Many thanks,

Paul