[PATCH] doc: Clarify documentation of 'bytevector-copy!'.

["Gábor Boskovits" <boskovits@gmail.com>]

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From b294afd366b8ce979ed5f549002057240a6ff478 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A1bor=20Boskovits?= <boskovits@gmail.com>
Date: Wed, 7 Aug 2019 14:34:05 +0200
Subject: [PATCH] doc: Clarify documentation of 'bytevector-copy!'.

* doc/ref/api-data.text (Bytevectors): Reword documentation
to use 'nonnegative' instead of 'positive' for 0-based index.
---
 THANKS                 | 1 +
 doc/THANKS             | 1 +
 doc/ref/api-data.texi  | 2 +-
 libguile/bytevectors.c | 2 +-
 4 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/THANKS b/THANKS
index a4fad6e08..fe208a720 100644
--- a/THANKS
+++ b/THANKS
@@ -1,6 +1,7 @@
 Contributors since the last release:
 
     Christopher Baines
+          Gábor	Boskovits
            Greg Benison
         Tristan Colgate-McFarlane
           Aleix Conchillo Flaqué
diff --git a/doc/THANKS b/doc/THANKS
index 53cff29f4..030b44f74 100644
--- a/doc/THANKS
+++ b/doc/THANKS
@@ -3,6 +3,7 @@ manuals!
 
 Proofreading, bug reports and patches from:
       Chris Bitmead
+      Gábor Boskovits
 Christopher Cramer
      Marcus Daniels
        Dirk Herrmann
diff --git a/doc/ref/api-data.texi b/doc/ref/api-data.texi
index 5b9c5654e..e7cb85881 100644
--- a/doc/ref/api-data.texi
+++ b/doc/ref/api-data.texi
@@ -6819,7 +6819,7 @@ Fill bytevector @var{bv} with @var{fill}, a byte.
 @deffn {Scheme Procedure} bytevector-copy! source source-start target target-start len
 @deffnx {C Function} scm_bytevector_copy_x (source, source_start, target, target_start, len)
 Copy @var{len} bytes from @var{source} into @var{target}, starting
-reading from @var{source-start} (a positive index within @var{source})
+reading from @var{source-start} (a nonnegative index within @var{source})
 and start writing at @var{target-start}.  It is permitted for the
 @var{source} and @var{target} regions to overlap.
 @end deffn
diff --git a/libguile/bytevectors.c b/libguile/bytevectors.c
index 7dfdab499..dfb4733c0 100644
--- a/libguile/bytevectors.c
+++ b/libguile/bytevectors.c
@@ -589,7 +589,7 @@ SCM_DEFINE (scm_bytevector_copy_x, "bytevector-copy!", 5, 0, 0,
 	    (SCM source, SCM source_start, SCM target, SCM target_start,
 	     SCM len),
 	    "Copy @var{len} bytes from @var{source} into @var{target}, "
-	    "starting reading from @var{source_start} (a positive index "
+	    "starting reading from @var{source_start} (a nonnegative index "
 	    "within @var{source}) and start writing at "
 	    "@var{target_start}.")
 #define FUNC_NAME s_scm_bytevector_copy_x
-- 
2.20.1