Replace echo with printf to add new lines in .strings lint logs

Author: mokagio

.buildkite/commands/lint-localized-strings-format.sh

@@ -24,8 +24,7 @@ if [[ $EXIT_CODE -ne 0 ]]; then
   # Strings generation finished with errors, extract the errors in an easy-to-find section
   echo "--- Report genstrings errors"
   ERRORS=errors.txt
-  echo "Found errors when trying to run \`genstrings\` to generate the \`.strings\` files from \`*LocalizedStrings\` calls:" | tee $ERRORS
-  echo '' >> $ERRORS
+  printf "Found errors when trying to run \`genstrings\` to generate the \`.strings\` files from \`*LocalizedStrings\` calls:\n\n" | tee $ERRORS
   # Print the errors inline.
   #
   # Notice the second `sed` call that removes the ANSI escape sequences that