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[PROPOSED PATCH] Fix doc quoting problems with Texinfo 5


Without this change, in the info file output Texinfo 5 quotes code
in text with undirected single quotes 'like this' and generates
code examples that with many PDF readers cannot be cut out of PDFs
and pasted into code.
* manual/libc.texinfo: Configure the libc manual like the GNU
Emacs manual, by using @documentencoding and setting
txicodequoteundirected and txicodequotebacktick.  This way,
Texinfo 5 quotes code in text with directed single quotes âlike
thisâ and produces examples that can be cut out of PDFs.  This
change causes Texinfo 5 to generate info files that contain UTF-8
characters in the set {'â', 'â', 'â', 'â', 'Ã', 'Ã', 'Ã', 'â',
'â', 'â', 'Â', 'â', 'â', 'â'}, which is OK nowadays.
---
 ChangeLog           | 14 ++++++++++++++
 manual/libc.texinfo |  7 +++++++
 2 files changed, 21 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 81e5791..6a71f9f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,19 @@
 2015-12-10  Paul Eggert  <eggert@cs.ucla.edu>
 
+	Fix doc quoting problems with Texinfo 5
+	Without this change, in the info file output Texinfo 5 quotes code
+	in text with undirected single quotes 'like this' and generates
+	code examples that with many PDF readers cannot be cut out of PDFs
+	and pasted into code.
+	* manual/libc.texinfo: Configure the libc manual like the GNU
+	Emacs manual, by using @documentencoding and setting
+	txicodequoteundirected and txicodequotebacktick.  This way,
+	Texinfo 5 quotes code in text with directed single quotes âlike
+	thisâ and produces examples that can be cut out of PDFs.  This
+	change causes Texinfo 5 to generate info files that contain UTF-8
+	characters in the set {'â', 'â', 'â', 'â', 'Ã', 'Ã', 'Ã', 'â',
+	'â', 'â', 'Â', 'â', 'â', 'â'}, which is OK nowadays.
+
 	Split large string section; add truncation advice
 	* manual/examples/strncat.c: Remove.
 	This example was misleading, as the code would have undefined
diff --git a/manual/libc.texinfo b/manual/libc.texinfo
index 554f8b0..5d8ad07 100644
--- a/manual/libc.texinfo
+++ b/manual/libc.texinfo
@@ -2,6 +2,13 @@
 @comment %**start of header (This is for running Texinfo on a region.)
 @setfilename libc.info
 @settitle The GNU C Library
+@documentencoding UTF-8
+@c '@codequotebacktick on' and '@codequoteundirected on' require
+@c Texinfo 5.0 or later, so use the older equivalent @set variables
+@c supported in Texinfo 4.11 and later.
+@set txicodequoteundirected
+@set txicodequotebacktick
+
 @c setchapternewpage odd
 
 @include macros.texi
-- 
2.1.0


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