Remove some explicit (Mutable)ArrayRef constructions #4238
Merged
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Rely on implicit conversion in call sites and initialization.
Removing the explicit conversions is only code simplication.
Moving from
auto x = Y(z)
toY x = z;
helps ensure that only implicit constructors/conversions are happening (whereas the prior syntax allows explicit conversions) which can help with readability since implicit conversions are generally "less complex"/risky/attention-requiring.