Revert "MM-1706 Changed mention highlighting code to split words on all non-word characters"

web/react/utils/utils.jsx

@@ -416,7 +416,7 @@ module.exports.textToJsx = function(text, options) {
     var lines = text.split("\n");
     for (var i = 0; i < lines.length; i++) {
         var line = lines[i];
-        var words = line.split(/(?=\W)/);
+        var words = line.split(" ");
         var highlightSearchClass = "";
         for (var z = 0; z < words.length; z++) {
             var word = words[z];