Make tutorials/docs PEP 3113 compliant (remove tuple parameter unpacking).

doc/extending/cop.txt

@@ -160,13 +160,17 @@ version that it produces in the code I gave above.
                raise TypeError('%s only works on doubles' % self.name)
            return gof.Apply(self, [x, y], [double()])
 
-       def perform(self, node, (x, y), (z, )):
+       def perform(self, node, inp, out):
+           x, y = inp
+           z, = out
            z[0] = self.fn(x, y)
 
        def __str__(self):
            return self.name
 
-       def c_code(self, node, name, (x, y), (z, ), sub):
+       def c_code(self, node, name, inp, out, sub):
+           x, y = inp
+           z, = out
            return self.ccode % locals()
 
 

doc/extending/op.txt

@@ -363,7 +363,9 @@ arithmetic operators:
                raise TypeError('%s only works on doubles' % self.name)
            return gof.Apply(self, [x, y], [double()])
 
-       def perform(self, node, (x, y), (z, )):
+       def perform(self, node, inp, out):
+           x, y = inp
+           z, = out
            z[0] = self.fn(x, y)
 
        def __str__(self):

doc/sandbox/sandbox.txt

@@ -89,9 +89,13 @@ write an Op:**
             return x * numpy.log(x)
         def impl(self, x):
             return XlogX.st_impl(x)
-        def grad(self, (x,), (gz,)):
+        def grad(self, inp, grads):
+            x, = inp
+            gz, = grads
             return [gz * (1 + scalar.log(x))]
-        def c_code(self, node, name, (x,), (z,), sub):
+        def c_code(self, node, name, inp, out, sub):
+            x, = inp
+            z, = out
             if node.inputs[0].type in [scalar.float32, scalar.float64]:
                 return """%(z)s =
                     %(x)s == 0.0

doc/tutorial/loading_and_saving.txt

@@ -133,7 +133,8 @@ matrix ``W`` and a bias ``b``, you can define:
     def __getstate__(self):
         return (W, b)
 
-    def __setstate__(self, (W,b)):
+    def __setstate__(self, state):
+        W, b = state
         self.W = W
         self.b = b
 
@@ -146,7 +147,8 @@ functions to reflect the change in name:
     def __getstate__(self):
         return (weights, bias)
 
-    def __setstate__(self, (W,b)):
+    def __setstate__(self, state):
+        W, b = state
         self.weights = W
         self.bias = b