[5.0] installerhelper codestyle

[brianteeman]

dont know why this codestyle issue was not picked up by the tests

[Quy]

I have tested this item ✅ successfully on 253ee37

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[richard67]

I have tested this item ✅ successfully on 253ee37

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[richard67]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/42138.}