From e1f3c74bdc458d5d4c528b30f30eabb56a5778d3 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Sat, 22 Jan 2022 20:33:55 +0100
Subject: [PATCH] RST: allow empty number-lines directives just like it was
 done for a decade; all my documents rely on this feature [backport (#19431)

(cherry picked from commit 15f54de5c4ee2f70e1304201ebc8c8634b731c9a)
---
 lib/packages/docutils/rstgen.nim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/packages/docutils/rstgen.nim b/lib/packages/docutils/rstgen.nim
index e2f0594613..bd3ab9dbb8 100644
--- a/lib/packages/docutils/rstgen.nim
+++ b/lib/packages/docutils/rstgen.nim
@@ -927,7 +927,8 @@ proc getField1Int(d: PDoc, n: PRstNode, fieldName: string): int =
   let nChars = parseInt(value, number)
   if nChars == 0:
     if value.len == 0:
-      err("field $1 requires an argument" % [fieldName])
+      # use a good default value:
+      result = 1
     else:
       err("field $1 requires an integer, but '$2' was given" %
           [fieldName, value])