Add support for shorttags in functions #605

Job	Run time
Tests (ubuntu-latest, 8.4, default)	1m 22s
Tests (ubuntu-latest, 8.1, default)	1m 18s
Tests (windows-latest, 7.4, default)	1m 54s
Tests (ubuntu-latest, 7.2, default)	1m 24s
Tests (windows-latest, 8.2, default)	1m 56s
Tests (windows-latest, 8.1, default)	1m 57s
Tests (windows-latest, 7.3, default)	1m 54s
Tests (windows-latest, 7.2, default)	1m 56s
Tests (windows-latest, 8.4, default)	1m 46s
Tests (ubuntu-latest, 8.3, default)	1m 24s
Tests (ubuntu-latest, 8.0, default)	1m 24s
Tests (ubuntu-latest, 7.3, default)	1m 18s
Tests (windows-latest, 8.0, default)	1m 55s
Tests (ubuntu-latest, 7.4, default)	1m 17s
Tests (windows-latest, 8.3, default)	2m 8s
Tests (ubuntu-latest, 8.2, default)	1m 21s
	26m 14s

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