From 511d647290eaa19907906807a9c4514a771ea66d Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sun, 4 Nov 2018 22:15:53 -0800
Subject: XML: toHtml5Entities: prefer shorter entities...

when there are several choices for a particular character.
---
 src/Text/Pandoc/XML.hs | 13 ++++++++++---
 test/command/ascii.md  |  4 ++--
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/Text/Pandoc/XML.hs b/src/Text/Pandoc/XML.hs
index 169951591..4c5d8d351 100644
--- a/src/Text/Pandoc/XML.hs
+++ b/src/Text/Pandoc/XML.hs
@@ -114,9 +114,16 @@ toHtml5Entities = T.concatMap go
                    Nothing -> T.pack ("&#" ++ show (ord c) ++ ";")
 
 html5EntityMap :: M.Map Char Text
-html5EntityMap = M.fromList [(c, T.takeWhile (/=';') (T.pack ent))
-                               | (ent@(_:_), [c]) <- htmlEntities
-                               , last ent == ';']
+html5EntityMap = foldr go mempty htmlEntities
+  where go (ent, s) entmap =
+         case s of
+           [c] -> M.insertWith
+                   (\new old -> if T.length new > T.length old
+                                   then old
+                                   else new) c ent' entmap
+             where ent' = T.takeWhile (/=';') (T.pack ent)
+           _   -> entmap
+
 
 -- Unescapes XML entities
 fromEntities :: String -> String
diff --git a/test/command/ascii.md b/test/command/ascii.md
index d8ab5ed50..96fc50291 100644
--- a/test/command/ascii.md
+++ b/test/command/ascii.md
@@ -2,7 +2,7 @@
 pandoc -t html --ascii
 äéıå
 ^D
-<p>&auml;&eacute;&inodot;&aring;</p>
+<p>&auml;&eacute;&imath;&aring;</p>
 ```
 
 ```
@@ -48,6 +48,6 @@ pandoc -t jats --ascii
 pandoc -t markdown-smart --ascii
 "äéıå"
 ^D
-&ldquo;&auml;&eacute;&inodot;&aring;&rdquo;
+&ldquo;&auml;&eacute;&imath;&aring;&rdquo;
 ```
 
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