Merge pull request #1485 from dpvc/issue1449

Allow line breaks within TeXAtom elements  Resolves issue #1449.

Author: dpvc

unpacked/jax/element/mml/jax.js

@@ -1463,6 +1463,7 @@ MathJax.ElementJax.mml.Augment({
 
   MML.TeXAtom = MML.mbase.Subclass({
     type: "texatom",
+    linebreakContainer: true,
     inferRow: true, notParent: true,
     texClass: MML.TEXCLASS.ORD,
     Core: MML.mbase.childCore,