Shorten a few helper functions in src/core/core_utils.js

[Snuffleupagus]

In a few cases we can ever so slightly shorten the code without negatively impacting the readability.

[Snuffleupagus]

/botio test

[moz-tools-bot]

From: Bot.io (Windows)

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Received

Command cmd_test from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.193.163.58:8877/f7aadf8b24b72fd/output.txt

[moz-tools-bot]

From: Bot.io (Linux m4)

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Received

Command cmd_test from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.241.84.105:8877/7b97747df647d34/output.txt

[moz-tools-bot]

From: Bot.io (Linux m4)

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Failed

Full output at http://54.241.84.105:8877/7b97747df647d34/output.txt

Total script time: 32.18 mins

• Unit tests: Passed
• Integration Tests: Passed
• Regression tests: FAILED

  errors: 18
  different ref/snapshot: 17
  different first/second rendering: 1

Image differences available at: http://54.241.84.105:8877/7b97747df647d34/reftest-analyzer.html#web=eq.log

[moz-tools-bot]

From: Bot.io (Windows)

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Failed

Full output at http://54.193.163.58:8877/f7aadf8b24b72fd/output.txt

Total script time: 46.61 mins

• Unit tests: Passed
• Integration Tests: FAILED
• Regression tests: Passed

[calixteman]

LGTM. Thank you.