Small bugfix to have guaranteed print out instance variables #4094

Job	Run time
windows (windows-2019, ucrt)	53s
test (master-nightly-focal, test)	2m 6s
windows (windows-2019, mswin)	56s
test (master-nightly-focal, stdlib_test)	2m 2s
windows (windows-2022, ucrt)	59s
test (master-nightly-focal, rubocop validate test_doc build test_generate_stdlib)	2m 11s
windows (windows-2022, mswin)	1m 32s
test (master-nightly-focal, lexer confirm_lexer)	3m 26s
test (master-nightly-focal, lexer compile)	3m 13s
test (3.2-dev-focal, test)	2m 1s
test (3.2-dev-focal, stdlib_test)	2m 5s
test (3.2-dev-focal, rubocop validate test_doc build test_generate_stdlib)	1m 59s
test (3.2-dev-focal, lexer confirm_lexer)	3m 12s
test (3.2-dev-focal, lexer compile)	3m 15s
test (3.1-dev-focal, test)	2m 7s
test (3.1-dev-focal, rubocop validate test_doc build test_generate_stdlib)	2m 2s
test (3.1-dev-focal, lexer confirm_lexer)	3m 19s
test (3.1-dev-focal, lexer compile)	3m 19s
test (3.0-dev-focal, test)	2m 18s
test (3.0-dev-focal, rubocop validate test_doc build test_generate_stdlib)	1m 59s
test (3.0-dev-focal, lexer confirm_lexer)	3m 14s
test (3.0-dev-focal, lexer compile)	3m 19s
	51m 27s

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