Typo fixes

doc/tutorial/extending_theano.txt

@@ -397,8 +397,8 @@ have to be jointly optimized explicitly in the code.)
 SciPy
 -----
 
-We can wrap SciPy function in Theano. But Scipy is an optional dependency.
-Here is some code that allow to make the op Optional:
+We can wrap SciPy functions in Theano. But SciPy is an optional dependency.
+Here is some code that allows the Op to be optional:
 
 .. code-block:: python
 
@@ -413,17 +413,19 @@ Here is some code that allow to make the op Optional:
         ...
         def make_node(self, x):
             assert imported_scipy, (
-            "Scipy not available. Scipy is needed for the SomeOp op.")
+            "SciPy not available. SciPy is needed for the SomeOp op.")
+            ...
 
     from nose.plugins.skip import SkipTest
-    class test_Solve(utt.InferShapeTester):
+    class test_SomeOp(utt.InferShapeTester):
         ...
         def test_infer_shape(self):
             if not imported_scipy:
-                raise SkipTest("Scipy needed for the Cholesky op.")
+                raise SkipTest("SciPy needed for the SomeOp op.")
+            ...
 
-Random number in tests
-----------------------
+Random numbers in tests
+-----------------------
 
 Making tests errors more reproducible is a good practice. To make your
 tests more reproducible, you need a way to get the same random

theano/tensor/nnet/Conv3D.py

@@ -560,7 +560,7 @@ conv3D = Conv3D()
 :param b: bias, shape == (W.shape[0],)
 :param d: strides when moving the filter over the input(dx, dy, dt)
 
-:note: The order of dimensions do not correspond with the one in `conv2d`.
+:note: The order of dimensions does not correspond to the one in `conv2d`.
        This is for optimization.
 """