tests

Import PUG guide to MANIFEST.in (#4108) #3562

Job	Run time
diffcov	6m 34s
docs	57s
test_cygwin (39, windows-latest)	16m 41s
test (3.8, ubuntu-latest)	4m 31s
test (3.8, macos-latest)	10m 4s
test (3.8, windows-latest)	12m 8s
test (3.11, ubuntu-latest)	4m 53s
test (3.11, macos-latest)	9m 6s
test (3.11, windows-latest)	13m 4s
test (3.12, ubuntu-latest)	6m 44s
test (3.12, macos-latest)	12m 13s
test (3.12, windows-latest)	12m 55s
test (3.9, ubuntu-latest)	4m 45s
test (3.10, ubuntu-latest)	4m 44s
test (pypy3.9, ubuntu-latest, stdlib)	6m 23s
test (ubuntu-latest, 3.10, stdlib)	4m 24s
integration-test	0s
check	2s
release	0s
	2h 10m 8s

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