Typo fixes and better phrasing

NEWS.txt

@@ -10,12 +10,12 @@ Bug fixes
  * In Sparse sandbox, fix the grad of theano.sparse.sandbox.sp.row_scale.
    It did not return the right number of elements. (Frederic B.)
  * set_subtensor(x[int vector], new_value) when moved to the GPU
-   where transformed into inc_subtensor on the GPU. Now we have a slow
-   GPU implementation.
-   Note: set_subtensor(x[slice[,...]], new_value) was working correctly
-   in all case as well as inc_subtensor(*, *).
-   Note2: If your code have this behavior, we print a warning by default.
-   (Frederic B.)
+   was transformed into inc_subtensor on the GPU. Now we have a correct
+   (but slow) GPU implementation.
+   Note 1: set_subtensor(x[slice[,...]], new_value) was working correctly
+   in all cases as well as inc_subtensor(*, *).
+   Note 2: If your code was affected by the incorrect behavior, we now print
+   a warning by default (Frederic B.)
  * Fixed an issue whereby config values were used as default arguments,
    with those defaults then stuck at old values if the config variables were
    changed during program execution. (David W-F)

theano/configdefaults.py

@@ -317,7 +317,7 @@ AddConfigVar('warn.subtensor_merge_bug',
 
 AddConfigVar('warn.gpu_set_subtensor1',
         "Warn if previous versions of Theano (before 0.6) could have given "
-        "incorrect results when moving to the gpu"
+        "incorrect results when moving to the gpu "
         "set_subtensor(x[int vector], new_value)",
         BoolParam(warn_default('0.6')),
         in_c_key=False)

theano/sandbox/cuda/cuda_ndarray.cu

@@ -2799,9 +2799,9 @@ int CudaNdarray_CopyFromCudaNdarray(CudaNdarray * self,
     if (self->nd < other->nd)
     {
         PyErr_Format(PyExc_NotImplementedError,
-            "CudaNdarray_CopyFromCudaNdarray: The destination need more or the"
-            " same number of dimensions then the source. Got %d and %d.",
-                     self->nd, other->nd);
+            "CudaNdarray_CopyFromCudaNdarray: The number of dimensions of the "
+            "destination needs to be >= the number of dimensions of the "
+            "source. Got %d and %d.", self->nd, other->nd);
         return -1;
     }
     else if (self->nd != other->nd)