t1512: become resilient to GETTEXT_POISON build

diff --git a/git-submodule.sh b/git-submodule.sh
index b57f87de658b627c48ec672faaab3dc6aac3b505..a1cc71b521b76c346509207f4ef9a24d48ead229 100755 (executable)
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -576,7 +576,7 @@ cmd_update()
                ${wt_prefix:+--prefix "$wt_prefix"} \
                ${prefix:+--recursive-prefix "$prefix"} \
                ${update:+--update "$update"} \
-               ${reference:+--reference "$reference"} \
+               ${reference:+"$reference"} \
                ${depth:+--depth "$depth"} \
                ${recommend_shallow:+"$recommend_shallow"} \
                ${jobs:+$jobs} \