Update doc/tutorial/loop.txt

It is unclear that A was an argument to inner_fct, because it is masking a variable named A in the surrounding scope. This was VERY confusing when trying to understand this code.

Update doc/tutorial/loop.txt
5f93bdf5 · Amir Elaguizy · d61c929b · 5f93bdf5
--- a/doc/tutorial/loop.txt
+++ b/doc/tutorial/loop.txt
@@ -35,8 +35,8 @@ The full documentation can be found in the library: :ref:`Scan <lib_scan>`.
  k = T.iscalar("k")
  A = T.vector("A")

-  def inner_fct(prior_result, A):
-      return prior_result * A
+  def inner_fct(prior_result, B):
+      return prior_result * B

  # Symbolic description of the result
  result, updates = theano.scan(fn=inner_fct,