curl + IPv6: common errors using direct IP

$ curl  -6 "http://a00:1450:4007:805::1018/"
curl: (3) IPv6 numerical address used in URL without brackets

$ curl  -6 "http://[a00:1450:4007:805::1018]/"
curl: (3) [globbing] bad range in column 13

$ curl  -g -6 "http://[2a00:1450:4007:805::1018]/"

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