unexpected behavior for built-in function `join` of jmespath #3115

Job	Run time
ci_test_compilers_clang2 (13)	12m 8s
ci_test_compilers_gcc2 (12)	19m 7s
ci_test_compilers_gcc (8)	12m 39s
ci_test_compilers_clang2 (15-bullseye)	11m 50s
ci_test_compilers_gcc2 (latest)	19m 11s
ci_test_compilers_clang (3.8)	17m 2s
ci_test_compilers_gcc (9)	12m 40s
ci_test_compilers_clang (3.9)	16m 37s
ci_test_compilers_gcc (10)	13m 41s
clang_14_build	43m 28s
ci_test_compilers_clang (4)	15m 21s
ci_test_compilers_gcc (11)	14m 24s
ci_test_compilers_clang (5)	15m 14s
gcc_build	12m 32s
ci_test_compilers_gcc (12)	14m 18s
ci_test_compilers_clang (6)	16m 6s
ci_test_compilers_gcc (latest)	14m 55s
gcc_build_no_deprecated	12m 4s
ci_test_compilers_clang (7)	18m 36s
gcc_build11b	1h 8m 18s
gcc_build12	16m 8s
github_20 (g++-12, Debug)	26m 1s
ci_test_compilers_clang (8)	17m 33s
github_20 (g++-12, Release)	26m 2s
ci_test_compilers_clang (9)	18m 54s
ci_test_compilers_clang (10)	20m 58s
ci_test_compilers_clang (11)	21m 48s
ci_test_compilers_clang (12)	21m 48s
ci_test_compilers_clang (13)	19m 38s
ci_test_compilers_clang (14)	19m 12s
ci_test_compilers_clang (15-bullseye)	18m 4s
	10h 6m 17s

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