[Toybox] [PATCH] man: fix help, align -k output, and fix double close.

[enh]

The "info" pages are something very different from the "intro" pages :-)

do_lines already closes the fd.

Also improve the error message for `man`.
---
 toys/pending/man.c | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)
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