Re: optional features and AC_ARG_WITH

[Paul Eggert]

Thanks for that documentation proposal.  A few comments (only the last
one is major):

Gregorio Guidi <address@hidden> writes:

> +The following example shows how to use the @code{AC_ARG_WITH} macro in
> +a very common situation. You want to let the user decide whether to enable

Remove "very".
Use English spacing after sentences; i.e., two spaces after the period.

> +support for an external library (e.g., the readline library); if the user
> +did not specify neither @option{--with-readline} nor

did not specify -> specified

> +    [support fancy command line editing <default=check>])],

Defaults should be in square brackets, not angle brackets.

One more-general comment: there is a lot of duplication here in the
three examples.  Can you rewrite it to give just one example, and
then briefly discuss the modifications needed for the other two cases?
That would make it easier to follow.