DOC: fix name and use better rest syntax.

doc/tutorial/multi_cores.txt

@@ -18,24 +18,25 @@ in parallel in Theano.
 Parallel element wise op with OpenMP
 ====================================
 
-Beacuse element wise ops work on every tensor entry indipedently they can be
-easly parallelized using openmp.
+Because element wise ops work on every tensor entry independently they can be
+easily parallelized using OpenMP.
 
-To use openmp you must set the openmp flag in Theano configuration.
+To use OpenMP you must set the OpenMP flag in Theano configuration.
 
-Yuo can use the flag openmp_elemwise_minsize to set the minimum tensor size
-for which the operation is parallelized because for short tensor using opemp
+You can use the flag ``openmp_elemwise_minsize`` to set the minimum tensor size
+for which the operation is parallelized because for short tensor using OpenMP
 can slow down the operation.
 
-If it is no specified the default value (200000) is used.
+If it is no specified the default value ``200000`` is used.
 
 For simple(fast) operation you can obtain a speed up for very long tensor
 while for more complex operation you ca obtain a good speed up also for not
 too long tensor. 
-There is a script (elemwise_openmp_speedup.py in theano/misc/) which you can
+
+There is a script ``elemwise_openmp_speedup.py`` in ``theano/misc/`` which you can
 use to choose that value for your machine.
 The script run two elemwise operation (a fast and a slow one) for a vector of
-size openmp_elemwise_minsize with and without openmp and show the time
+size ``openmp_elemwise_minsize`` with and without OpenMP and show the time
 difference between the two cases.