From 5608dc01e5342d367fba3377042dec3944f4d86f Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Wed, 10 Mar 2021 10:19:40 -0800
Subject: HTML writer: Add warnings on duplicate attribute values.

This prevents emitting invalid HTML.

Ultimately it would be good to prevent this in the types
themselves, but this is better for now.

T.P.Logging: Add DuplicateAttribute constructor to LogMessage.
[API change]
---
 test/command/duplicate_attributes.md | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 test/command/duplicate_attributes.md

(limited to 'test/command')

diff --git a/test/command/duplicate_attributes.md b/test/command/duplicate_attributes.md
new file mode 100644
index 000000000..b6e8a4c21
--- /dev/null
+++ b/test/command/duplicate_attributes.md
@@ -0,0 +1,7 @@
+```
+% pandoc
+[span]{.foobar style="color:blue" class="zip" style="color:red"}
+^D
+[WARNING] Ignoring duplicate attribute style="color:red".
+<p><span class="foobar zip" style="color:blue">span</span></p>
+```
-- 
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