Improve interjection

scripts/interjection.coffee

@@ -7,8 +7,32 @@
 # Author:
 #   Enrico Fasoli (fazo96)
 
+image = 'https://lut.im/trSfl2cdfX/TDIkX3SjLhKJ2qm5.jpg'
+
+interjection = "
+I’d just like to interject for a moment. What you’re refering to as Linux, is in
+fact, GNU/Linux, or as I’ve recently taken to calling it, GNU plus Linux. Linux
+is not an operating system unto itself, but rather another free component of a
+fully functioning GNU system made useful by the GNU corelibs, shell utilities
+and vital system components comprising a full OS as defined by POSIX.
+
+Many computer users run a modified version of the GNU system every day, without
+realizing it. Through a peculiar turn of events, the version of GNU which is
+widely used today is often called “Linux”, and many of its users are not aware
+that it is basically the GNU system, developed by the GNU Project.
+
+There really is a Linux, and these people are using it, but it is just a part of
+the system they use. Linux is the kernel: the program in the system that
+allocates the machine’s resources to the other programs that you run. The kernel
+is an essential part of an operating system, but useless by itself; it can only
+function in the context of a complete operating system. Linux is normally used
+in combination with the GNU operating system: the whole system is basically GNU
+with Linux added, or GNU/Linux. All the so-called “Linux” distributions are
+really distributions of GNU/Linux.
+"
+
 module.exports = (robot) ->
-  robot.hear /(.)*linux(.)*/i, (res) ->
+  robot.hear /linux/i, (res) ->
-    s = res.match[0]
+    s = res.message.text
-    if s.toLowerCase().indexOf('gnu') < 0
+    if not s.match /(GNU ?[+\/])|(kernel )Linux/i
-      res.send 'http://s2.quickmeme.com/img/b9/b91afe13fc7e1b79898b1f65a12b4d23a25d5083ec0410185ff563fdf8ce8a87.jpg'
+        res.send image, interjection