From 5866892a9d9a17403894cea97370e1c2be4fcb03 Mon Sep 17 00:00:00 2001
From: Kirill Müller <krlmlr@users.noreply.github.com>
Date: Sat, 4 Aug 2018 21:17:10 +0200
Subject: Describe required space as breaking change (#4808)

---
 changelog | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/changelog b/changelog
index 4538657c0..37bb6e071 100644
--- a/changelog
+++ b/changelog
@@ -2610,6 +2610,11 @@ pandoc (2.0)
       (since the two-space version of a line break doesn't work inside ATX
       headers, and neither version works inside Setext headers).
 
+    + A space between the opening # and the header is now required for
+      pandoc and GitHub markdown (but not the other flavors). Disable
+      the `space_in_atx_header` extension (#3512) to restore the
+      original behavior.
+
 
   * Org reader (Albert Krewinkel, unless noted):
 
-- 
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