Rearrange the long help text so that '--config' does not appear at the
start of a line which groff interprets as an undefined macro and skips
the content of that whole line.
To reproduce:
$ go run cmd/gen-docs/main.go --man-page --doc-path /tmp/gh-manpages
$ man --warnings -E UTF-8 -l -Tutf8 -Z /tmp/gh-manpages/gh-codespace-ssh.1 >/dev/null
troff: <standard input>:26: warning: macro '--config'' not defined
Discovered by the Debian Lintian tool.
f6d0f82701