fix tooltip with array returns

diff --git a/src/core/core.tooltip.js b/src/core/core.tooltip.js
index e21934140515152c23e0100241213af1d9a2c29a..d55dd2be050c3cb86d892765a93b50b1b60b892d 100755 (executable)
--- a/src/core/core.tooltip.js
+++ b/src/core/core.tooltip.js
@@ -86,7 +86,8 @@ module.exports = function(Chart) {
        function pushOrConcat(base, toPush) {
                if (toPush) {
                        if (helpers.isArray(toPush)) {
-                               base = base.concat(toPush);
+                               //base = base.concat(toPush);
+                               Array.prototype.push.apply(base, toPush);
                        } else {
                                base.push(toPush);
                        }