11191 zfs.1m: UNSUPP: unsupported escape sequence: \?

Review Request #1970 — Created June 6, 2019 and submitted — Latest diff uploaded

mno-hime
illumos-gate
master
11191
1975
f24f94b...
general

11191 zfs.1m: UNSUPP: unsupported escape sequence: \?

This is required for mandoc 1.14.5 update (#11190).

With mandoc 1.14.5.

Before:

$ mandoc -Tlint -Wwarning ~/ws/illumos-gate/usr/src/man/man1m/zfs.1m 
mandoc: /export/home/newman/ws/illumos-gate/usr/src/man/man1m/zfs.1m:40:8: UNSUPP: unsupported escape sequence: \?
mandoc: /export/home/newman/ws/illumos-gate/usr/src/man/man1m/zfs.1m:1864:11: UNSUPP: unsupported escape sequence: \?

After:

$ mandoc -Tlint -Wwarning /usr/share/man/man1m/zfs.1m

$ mandoc -l /usr/share/man/man1m/zfs.1m

ZFS(1M)                      Maintenance Commands                      ZFS(1M)

NAME
     zfs – configures ZFS file systems

SYNOPSIS
     zfs [-?]
...
     zfs -?
       Displays a help message.
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