Typo fixes

doc/extending/ctype.txt

@@ -507,9 +507,9 @@ DeepCopyOp
 
 We have an internal Op called DeepCopyOp. It is used to make sure we
 respect the user vs Theano memory region as described in the :ref:`tutorial
-<aliasing>`. Theano have a python implementation that call the object
-``copy()`` or``deepcopy()`` method for Theano Type that it don't know
-how to generate c code.
+<aliasing>`. Theano has a Python implementation that calls the object's
+``copy()`` or ``deepcopy()`` method for Theano types for which it does not
+know how to generate C code.
 
 You can implement c_code for this op. You register it like this:
 
@@ -517,10 +517,10 @@ You can implement c_code for this op. You register it like this:
 
    theano.compile.function_module.register_DeepCopyOp_c_code(YOUR_TYPE_CLASS, THE_C_CODE)
 
-In your c code, you should use %(iname)s and %(oname)s to represent
-the c variable name of the DeepCopyOp input and output
-respectively. See an example for the gpu object in the file
-`theano/sandbox/cuda/type.py`.
+In your C code, you should use %(iname)s and %(oname)s to represent
+the C variable names of the DeepCopyOp input and output
+respectively. See an example for the type ``CudaNdarrayType`` (GPU array)
+in the file `theano/sandbox/cuda/type.py`.
 
 Output Guard
 ============

theano/compile/function_module.py

@@ -130,13 +130,13 @@ class AliasedMemoryError(Exception):
 ###
 
 def register_DeepCopyOp_c_code(typ, code):
-    """ Tell DeepCopyOp how to generate c code for a Theano Type
+    """ Tell DeepCopyOp how to generate C code for a Theano Type
 
-    :param typ: A Theano type. It must be theano class itself and not an
-                object of the class.
-    :param code: C code that deep copy the Theano type 'typ'.
-                 use %(iname)s and %(oname)s for the input and output c
-                 variable name respectively.
+    :param typ: A Theano type. It must be the Theano class itself and not an
+                instance of the class.
+    :param code: C code that deep copies the Theano type 'typ'.
+                 Use %(iname)s and %(oname)s for the input and output C
+                 variable names respectively.
     """
     DeepCopyOp.c_codes[typ] = code