Whispered GM Macro w/table showing whispered chat AND an empty public chat message?

Hi. Created this macro with a Wild Magic Surge table in it. I have it set to whisper the response to GM, which it does, but then follows it up with a blank public message from DMT (me, the GM). This gives away the fact that I'm activating a whispered macro. Any ideas how to fix this and get rid of the DMT (GM) empty chat message? The macro: /w gm &{template:default} {{name=Wild Magic Surge}} {{ [[ 1t[Wild Magic Surge] ]]}} The chat response:

That's usually the result of an extra line in the macro. Click in your macro text and push the down arrow until you gat to the bottom, then backspace to delete any empty lines. 

That did it. Thanks so much for the quick response, Aaron!