From 6c266dd4aaac691abe848e2b1b37fb5d8e32df75 Mon Sep 17 00:00:00 2001
From: "Davide P. Cervone" <dpvc@union.edu>
Date: Mon, 8 Jun 2020 09:14:43 -0400
Subject: [PATCH] Fix problems with texClass

---
 ts/core/MmlTree/MmlNodes/mo.ts   | 1 -
 ts/core/MmlTree/MmlNodes/mrow.ts | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/ts/core/MmlTree/MmlNodes/mo.ts b/ts/core/MmlTree/MmlNodes/mo.ts
index dad897c57..a1a4f7694 100644
--- a/ts/core/MmlTree/MmlNodes/mo.ts
+++ b/ts/core/MmlTree/MmlNodes/mo.ts
@@ -218,7 +218,6 @@ export class MmlMo extends AbstractMmlTokenNode {
     let {form, fence} = this.attributes.getList('form', 'fence') as {form: string, fence: string};
     if (this.getProperty('texClass') === undefined &&
         (this.attributes.isSet('lspace') || this.attributes.isSet('rspace'))) {
-      this.texClass = TEXCLASS.NONE;
       return null;
     }
     if (fence && this.texClass === TEXCLASS.REL) {
diff --git a/ts/core/MmlTree/MmlNodes/mrow.ts b/ts/core/MmlTree/MmlNodes/mrow.ts
index baed5872e..ed4232d6d 100644
--- a/ts/core/MmlTree/MmlNodes/mrow.ts
+++ b/ts/core/MmlTree/MmlNodes/mrow.ts
@@ -154,7 +154,7 @@ export class MmlMrow extends AbstractMmlNode {
    */
   public setTeXclass(prev: MmlNode) {
     if ((this.getProperty('open') != null || this.getProperty('close') != null) &&
-        (!prev || prev.getProperty('fnOp') != null)) {
+        (!prev || prev.getProperty('fnOP') != null)) {
       //
       // <mrow> came from \left...\right
       //   so treat as subexpression (TeX class INNER).