Amend documentation for text-quoting-style becoming a user option.

* doc/lispref/control.texi (Signaling Errors):
* doc/lispref/display.texi (Displaying Messages):
* doc/lispref/strings.texi (Formatting Strings):
Edit for brevity, farming out the details to the new
Text Quoting Style node.
* doc/lispref/help.texi (Text Quoting Style): New section.
Move detailed discussion of text-quoting-style here.
Add discussion about how to output grave accent and apostrophe in
documentation and messages.  Adjust xrefs to point to this section
when appropriate.
* etc/NEWS: text-quoting-style semantics have not changed.

1 files changed, 2 insertions, 4 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 20182c1b816..51122b1152a 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1247,10 +1247,8 @@ change FOO, respectively.  The exhaustive list of removed variables is:
 ** The variable 'text-quoting-style' is now a customizable option.  It
 controls whether to and how to translate ASCII quotes in messages and
 help output.  Its possible values and their semantics remain unchanged
-from Emacs 25, except that 'text-quoting-style' no longer affects the
-treatment of curved quotes in format arguments to functions like
-'message' and 'format-message'.  In particular, when this variable's
-value is 'grave', all quotes in formats are output as-is.
+from Emacs 25.  In particular, when this variable's value is 'grave',
+all quotes in formats are output as-is.
 
 ---
 ** Functions like 'check-declare-file' and 'check-declare-directory'