fix shellcheck error

Author: tomcz

tools/stubs.sh

@@ -1,7 +1,8 @@
 #!/usr/bin/env bash
+set -eo pipefail
 
-for src in $(grep -r -l 'Code generated by moq' --include='*.go' | grep -v 'vendor/'); do
-  echo "Processing ${src} ..."
+grep -r -l 'Code generated by moq' --include='*.go' | grep -v 'vendor/' | while read -r src; do
+  echo "Converting ${src} ..."
   sed 's/mocked/stubbed/g;s/mock/stub/g' "${src}" > "${src}.temp"
   mv "${src}.temp" "${src}"
 done