GNU logs - #24812, boring messages

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Subject: bug#24812: 25.1; Missing (binary) radix format directive
Resent-From: Alex <agrambot@HIDDEN>
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Emacs' `format' has %o, %x, and %d, but it's missing both the ~r and ~b
radix directives from Common Lisp's `format'.

I can understand leaving out ~r, but I think ~b is worth adding to
Emacs' `format'.

CL example:
(format nil "~b" 5) => "101"

Requested:
(format "%b" 5) => "101"

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Subject: bug#24812: Acknowledgement (25.1; Missing (binary) radix format
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Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#24812: 25.1; Missing (binary) radix format directive
Resent-From: Alex <agrambot@HIDDEN>
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Date: Sat, 29 Oct 2016 13:34:02 -0600
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Alex <agrambot@HIDDEN> writes:

> Emacs' `format' has %o, %x, and %d, but it's missing both the ~r and ~b
> radix directives from Common Lisp's `format'.
>
> I can understand leaving out ~r, but I think ~b is worth adding to
> Emacs' `format'.
>
> CL example:
> (format nil "~b" 5) => "101"
>
> Requested:
> (format "%b" 5) => "101"

I noticed that while string_to_number supports an arbitrary base,
number_to_string doesn't.

If number_to_string was symmetric in this aspect, then ~b and ~r should
be straightforward to implement, right?

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