Fix: --date option in gbl can not be overridden anymore (#385)

The order of the arguments passed to git blame in _forgit_blame_preview
has been changed in bfffda6, putting --date=short as the last argument
instead of the first. This caused it taking precedence of anything
defined in $FORGIT_BLAME_GIT_OPTS.
This commit restores the order of the arguments to what they were before
bfffda6.

bin/git-forgit

@@ -865,7 +865,7 @@ _forgit_blame_preview() {
     if _forgit_is_file_tracked "$1"; then
         _forgit_blame_git_opts=()
         _forgit_parse_array _forgit_blame_git_opts "$FORGIT_BLAME_GIT_OPTS"
-        git blame "$@" "${_forgit_blame_git_opts[@]}" --date=short | _forgit_pager blame
+        git blame --date=short "${_forgit_blame_git_opts[@]}" "$@" | _forgit_pager blame
     else
         echo "File not tracked"
     fi