From fa40ad5ebd952cb1b76465e966d00908148878c0 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 16 Jan 2017 16:58:29 +0200
Subject: Specify diff pseudo-builtin in testscript doc

---
 doc/testscript.cli | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'doc')

diff --git a/doc/testscript.cli b/doc/testscript.cli
index b685e1d..754a24a 100644
--- a/doc/testscript.cli
+++ b/doc/testscript.cli
@@ -2176,6 +2176,20 @@ Read files in order and write their contents to \c{stdout}. Read from
 \c{stdin} if no file is specified or \c{-} is specified as a file name.
 
 
+\h#builtins-diff|\c{diff}|
+
+\
+diff [-u] [-U <num>] <file1> <file2>
+\
+
+Compare the contents of \i{file1} and \i{file2}.
+
+The \c{diff} utility is not a builtin. Instead, the test platform is expected
+to provide a (reasonably) POSIX-compatible implementation. It should at least
+supports the \c{-u} and \c{-U} options. On Windows GNU \c{diff} can be
+assumed (provided as part of the \c{build2} toolchain).
+
+
 \h#builtins-echo|\c{echo}|
 
 \
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