Fix dev/core#4959 - Handle extra whitespace in scheduled job params

[colemanw]

Overview

Fixes https://lab.civicrm.org/dev/core/-/issues/4959

Before

Extra newlines in scheduled job parameters (textarea) cause errors.

After

No errors.

Technical Details

This regressed with ebe5df9

[civibot]

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[eileenmcnaughton]

@colemanw CRM_Core_JobManagerTest::testHookCron
trim(): Passing null to parameter #1 ($string) of type string is deprecated

/home/homer/buildkit/build/build-0/web/sites/all/modules/civicrm/CRM/Core/BAO/Job.php:129
/home/homer/buildkit/build/build-0/web/sites/all/modules/civicrm/CRM/Core/ScheduledJob.php:142
/home/homer/buildkit/build/build-0/web/sites/all/modules/civicrm/CRM/Core/JobManager.php:158
/home/homer/buildkit/build/build-0/web/sites/all/modules/civicrm/CRM/Core/JobManager.php:43
/home/homer/buildkit/build/build-0/web/sites/all/modules/civicrm/tests/phpunit/CRM/Core/JobManagerTest.php:27
/home/homer/buildkit/build/build-0/web/sites/all/modules/civicrm/tests/phpunit/CiviTest/CiviUnitTestCase.php:247
/home/homer/buildkit/extern/phpunit9/phpunit9.phar:2307

[eileenmcnaughton]

@colemanw do we have a back port here?

[colemanw]

@eileenmcnaughton I was kinda hoping @jmcclelland would verify this fixes the issue before we had to release it but it certainly isn't going to hurt anything so it's fine that you merged. At worst it will do nothing.

[colemanw]

Anyway here is a backport ^