Update int.cloudbuild.yaml

Author: apeabody

build/int.cloudbuild.yaml

@@ -36,10 +36,10 @@ steps:
 
       # Do not prune if changing tests themselves
       _INFRA_FOLDERS="build test .github"
+      while read _changed_folders; do 
       for d in _changed_folders; do
-        echo "${d%/}"
-        if [[ "${_INFRA_FOLDERS}" =~ "${d%/}" ]]; then
-          echo "Infrastructure folders have changed; no tests will be pruned."
+        if [[ "${_INFRA_FOLDERS}" =~ "${_changed_folders%/}" ]]; then
+          echo "Infrastructure folder ${_changed_folders%/} has changed; no tests will be pruned."
           exit 0 # do not prune
         fi
       done