DocBook reader: Fix bug with entities in mathphrase element.

Closes #5885.

1 files changed, 20 insertions, 0 deletions

diff --git a/test/command/5885.md b/test/command/5885.md
new file mode 100644
index 000000000..451929b5b
--- /dev/null
+++ b/test/command/5885.md
@@ -0,0 +1,20 @@
+```
+% pandoc -f docbook -t latex
+<equation>
+  <mathphrase>
+    J(x, y) = \left\{ \begin{array}{ll}
+    0 &amp; \text{if $I(x, y) &lt; t$} \\
+    1 &amp; \text{if $I(x, y) \ge t$}
+    \end{array}
+    \right.
+  </mathphrase>
+</equation>
+^D
+\[
+    J(x, y) = \left\{ \begin{array}{ll}
+    0 & \text{if $I(x, y) < t$} \\
+    1 & \text{if $I(x, y) \ge t$}
+    \end{array}
+    \right.
+  \]
+```