Improved Bash idioms in test/cmd/images.sh

Signed-off-by: Steve Kuznetsov <[email protected]>

test/cmd/images.sh

@@ -66,7 +66,7 @@ os::cmd::expect_success 'oc create -f test/fixtures/mysql-image-stream-mapping.y
 os::cmd::expect_success_and_text 'oc get istag/test:new --template="{{ index .image.dockerImageMetadata.Config.Entrypoint 0 }}"' "docker-entrypoint.sh"
 os::cmd::expect_success_and_text 'oc get istag/test:new -o jsonpath={.image.metadata.name}' 'sha256:b2f400f4a5e003b0543decf61a0a010939f3fba07bafa226f11ed7b5f1e81237'
 # reference should point to the current repository, and that repository should match the reported dockerImageRepository for pushes
-repository=$(oc get is/test -o jsonpath={.status.dockerImageRepository})
+repository="$(oc get is/test -o jsonpath={.status.dockerImageRepository})"
 os::cmd::expect_success_and_text 'oc get istag/test:new -o jsonpath={.image.dockerImageReference}' "^$repository@sha256:b2f400f4a5e003b0543decf61a0a010939f3fba07bafa226f11ed7b5f1e81237"
 os::cmd::expect_success_and_text 'oc get istag/test:new -o jsonpath={.image.dockerImageReference}' "/$project/test@sha256:b2f400f4a5e003b0543decf61a0a010939f3fba07bafa226f11ed7b5f1e81237"