From d2d15fd4f70da8959d8222229c4e12c85ead8db3 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sun, 28 May 2017 16:52:14 +0200
Subject: Add example of doubled single-quoting idiom

---
 doc/testscript.cli | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'doc/testscript.cli')

diff --git a/doc/testscript.cli b/doc/testscript.cli
index 189018e..4c585ec 100644
--- a/doc/testscript.cli
+++ b/doc/testscript.cli
@@ -1320,6 +1320,17 @@ args = \'&foo\'  # '&foo'
 echo $args       # echo &foo
 \
 
+To make sure that a string is passed as is through both expansions use the
+\i{doubled single-quoting} idiom, for example:
+
+\
+filter = sed -e \''s/foo (bar|baz)/$&/'\'
+$* <<EOI | $filter >>EOO
+...
+EOI
+...
+EOO
+\
 
 \h1#syntax|Syntax and Semantics|
 
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