bug#24901: Patch updated slightly

[Reuben Thomas]

On 2 December 2016 at 09:45, Eli Zaretskii <eliz@gnu.org> wrote:

> From: Reuben Thomas <rrt@sc3d.org>
> Date: Mon, 28 Nov 2016 22:24:39 +0000
>
> From 4a04639203dca2d5903fd943e5fb2e4ccc7b995f Mon Sep 17 00:00:00 2001
> From: Reuben Thomas <rrt@sc3d.org>
> Date: Tue, 8 Nov 2016 11:53:20 +0000
> Subject: [PATCH 1/4] Add support for curly quotation marks to
>  electric-pair-mode
>
> * lisp/elec-pair.el (electric-pair-pairs, electric-pair-text-pairs): Add
> entries for left/right single/double quotation marks, from
> electric-quote-chars. Note that this is safe for single quotation marks,
> unlike with the ASCII apostrophe, since, although the right quotation
> mark can be used as an apostrophe, it is the left quotation mark that is
> typed to get a pair (Bug#24901).

Can you tell more about this?  The original bug report doesn't include
any rationale, so it's hard for me to make up my mind about this
change.

​Rationale: electric-pair-mode already has support for straight double-quote pairs, so it is logical to add support for curly double-quote pairs. As with straight double quotes, it's logical that these be supported everywhere. The same goes for straight single quotes, which are generally used for the same purpose as curly double and single double quotes, that is, quoting (in human language).

The use of electric-quote-chars means that electric-pair-mode will automatically use whatever the user has configured for single and double quotes.

In particular, I don't understand the last sentence of the log
message; can you elaborate?

​electric-pair-mode does not by default produce pairs of straight single quote (apostrophe). This is because it does not always make sense: a single apostrophe is often used on its own. However, with curly single quotes, it makes sense for electric-pair-mode to make typing a left curly quote automatically add a corresponding right quote, as left curly quotes are not normally used on their own. (Right single curly quotes can be used on their own, as an apostrophe, but this is irrelevant here, as electric-pair-mode acts when the left-hand mark is typed, not the right-hand mark).

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