Fix sphinx warning by renaming args.sh.out
Fix sphinx warning (time(1) -> time(1posix))
Fix sphinx warning for a title
Fix sphinx warning
Fix sphinx warning and outstanding indentation issue

The code and the paragraph after was not displayed because of this
indentation of 1 space
Add missing space separator
Fix link (time(3) -> time(3posix))

Is it time(2) instead of time(3posix) ?
both are available
Add missing blank line
Remove duplicates and sort man_links

There were duplicates with different cases.
Since sphinx is cas insensitive, it generated warnings.
I did a
$ cat man_links.rst | tr '[A-Z]' '[a-z]' | sort | uniq > tmp
$ mv tmp man_links.rst
Now they are also sorted so it is easier to search through them