From 122ca093524151ec5e0f02a90881deb36ba24fbb Mon Sep 17 00:00:00 2001
From: "Davide P. Cervone" <dpvc@union.edu>
Date: Mon, 29 Jun 2015 10:23:32 -0400
Subject: [PATCH] Fix problem with dot delimiter not being recognized as a
 delimiter because TEXDEF.delimiter[.] returns an empty string.  Resolves
 issue #1199.

---
 unpacked/extensions/TeX/AMSmath.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/unpacked/extensions/TeX/AMSmath.js b/unpacked/extensions/TeX/AMSmath.js
index 57dd41853..5bcaeba21 100644
--- a/unpacked/extensions/TeX/AMSmath.js
+++ b/unpacked/extensions/TeX/AMSmath.js
@@ -400,7 +400,7 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
     GetDelimiterArg: function (name) {
       var c = this.trimSpaces(this.GetArgument(name));
       if (c == "") return null;
-      if (TEXDEF.delimiter[c]) return c;
+      if (c in TEXDEF.delimiter) return c;
       TEX.Error(["MissingOrUnrecognizedDelim","Missing or unrecognized delimiter for %1",name]);
     },