Merge pull request #1049 from MrBrain295/Double-quotes

Migrate to double quotes

h/Hack.hh

@@ -1,2 +1,2 @@
 <?hh 
-echo 'Hello World';
+echo "Hello World";

h/Hubot.coffee

@@ -1,3 +1,3 @@
 module.exports = (robot) ->
   robot.respond /hello/i, (msg) ->
-    msg.send 'Hello World'
+    msg.send "Hello World"