mandoc: unsupp.in:7:23: WARNING: invalid escape sequence: \[!] mandoc: unsupp.in:7:20: UNSUPP: unsupported escape sequence: \! mandoc: unsupp.in:8:24: WARNING: invalid escape sequence: \[?] mandoc: unsupp.in:8:21: UNSUPP: unsupported escape sequence: \? mandoc: unsupp.in:8:17: UNSUPP: unsupported escape sequence: \?